IBM sometimes uses the same number for a system and for the principal component of that system. For example, the IBM 604 Calculating Unit is a component of the IBM 604 Calculating Punch. And different IBM divisions used the same model numbers; for example IBM 01 without context clues could be a reference to a keypunch or to IBM's first electric typewriter.
Number sequence may not correspond to product development sequence. For example, the 402 tabulator was an improved, modernized 405.
IBM uses two naming structures for its modern hardware products. Products are normally given a three- or four-digit machine type and a model number (it can be a mix of letters and numbers). A product may also have a marketing or brand name. For instance, 2107 is the machine type for the IBM System Storage DS8000. While the majority of products are listed here by machine type, there are instances where only a marketing or brand name is used. Care should be taken when searching for a particular product as sometimes the type and model numbers overlap. For instance the IBM storage product known as the Enterprise Storage Server is machine type 2105, and the IBM printing product known as the IBM Infoprint 2105 is machine type 2705, so searching for an IBM 2105 could result in two different products—or the wrong product—being found.
IBM introduced the 80-column rectangular hole punched card in 1928. Pre-1928 machine models that continued in production with the new 80-column card format had the same model number as before. Machines manufactured prior to 1928 were, in some cases, retrofitted with 80-column card readers and/or punches thus there existed machines with pre-1928 dates of manufacture that contain 1928 technology.
This list is organized by classifications of both machines and applications, rather than by product name. Thus some (few) entries will be duplicated. The 1420, for example, is listed both as a member of the 1401 family and as a machine for Bank and finance.
IBM product names have varied over the years; for example these two texts both reference the same product.
This article uses the name, or combination of names, most descriptive of the product. Thus the entry for the above is
IBM Executary dictation equipment line (1960-1972).
Collators (a collator was a feature of a copier, but was sold as a separate machine type):
IBM also sold a range of copier supplies including paper rolls (marketed as IBM General Copy Bond), cut sheet paper (marketed as IBM multi-system paper) and toner.
For these computers most components were unique to a specific computer and are shown here immediately following the computer entry.
IBM announced a range of Microfilm products in 1963 and 1964 and withdrew them in 1969.
In IBM's terminology beginning with the System/360 disk and such devices featuring short access times were collectively called DASD. The IBM 2321 Data Cell is a DASD that used tape as its storage medium. See also history of IBM magnetic disk drives.
Some IBM software products were distributed free (no charge for the software itself, a common practice early in the industry). The term "Program Product" was used by IBM to denote that the software is generally available at an additional charge. Prior to June 1969, the majority of software packages written by IBM were available at no charge to IBM customers; with the June 1969 announcement, new software not designated as "System Control Programming" became Program Products, although existing non-system software remained available for free.
IBM distributes its diverse collection of software products over several brands; mainly:
The Watson Customer Engagement (commonly known as WCE and formerly known as IBM Commerce) business unit supports marketing, commerce, and supply chain software development and product offerings for IBM. Software and solutions offered as part of these three portfolios by WCE are as follows:
"IBM hardware list to 1987" (PDF). IBM Hursley Park museum. Peter Short. Archived (PDF) from the original on 2022-10-09. https://slx-online.biz/hursley/docs/hardware_list_to_1987.pdf
"IBM hardware list to 1987" (PDF). IBM Hursley Park museum. Peter Short. Archived (PDF) from the original on 2022-10-09. https://slx-online.biz/hursley/docs/hardware_list_to_1987.pdf
Bashe, Charles J. (1986). IBM's Early Computers. MIT. p. 70. ISBN 9780262022255. 9780262022255
Truesdell, Leon E. (1965). The Development of Punch Card Tabulation in the Bureau of the Census 1890-1940. US GPO. /wiki/Leon_E._Truesdell
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Scans of plates in L.J. Comrie articles from Monthly Notices of the Royal Astronomical Society 1928 and 1932, here /wiki/Leslie_Comrie
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
IBM Sales Manual. IBM. pages dated from 1963 to 1974
Fierheller, George A. (2014). Do not fold, spindle or mutilate: the "hole" story of punched cards (PDF). Stewart Pub. p. 25. ISBN 978-1-894183-86-4. Archived (PDF) from the original on 2022-10-09. An accessible book of recollections (sometimes with errors), with photographs and descriptions of many unit record machines. 978-1-894183-86-4
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
IBM Sales Manual. IBM. pages dated from 1963 to 1974
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Scans of plates in L.J. Comrie articles from Monthly Notices of the Royal Astronomical Society 1928 and 1932, here /wiki/Leslie_Comrie
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM 29 card punch". IBM Archives. IBM. 2003-01-23. Archived from the original on September 9, 2006. https://web.archive.org/web/20060909092223/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV4002.html
"IBM 31 Alphabetical Duplicating Punch". IBM Archives. IBM. 2003-01-23. Archived from the original on January 24, 2005. https://web.archive.org/web/20050124032639/http://www-03.ibm.com/ibm/history/exhibits/attic3/attic3_0151.html
"IBM Type 032 Alphabetical Printing Punch". IBM Archives. IBM. 2003-01-23. Archived from the original on March 21, 2005. https://web.archive.org/web/20050321191650/http://www-03.ibm.com/ibm/history/exhibits/attic3/attic3_140.html
Linnekin, Leroy Corliss (1938). The Scope of Punched Card Accounting. Boston University, College of Business Administration - Thesis. https://archive.org/details/scopeofpunchedca00linn
Machine Methods of Accounting, IBM, 1936
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
"IBM 40 tape controlled card punch". IBM Archives. IBM. 2003-01-23. Archived from the original on January 1, 2007. https://web.archive.org/web/20070101115617/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV4003.html
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
"IBM 29 card punch". IBM Archives. IBM. 2003-01-23. Archived from the original on September 9, 2006. https://web.archive.org/web/20060909092223/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV4002.html
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
"IBM 797 Document Numbering Punch". IBM Archives. IBM. 2003-01-23. Archived from the original on December 30, 2006. https://web.archive.org/web/20061230192333/http://www-03.ibm.com/ibm/history/exhibits/attic3/attic3_156.html
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
Machine Functions (PDF). IBM. 1957. 224-8208-3. Archived (PDF) from the original on 2022-10-09. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/224-8208-3_Machine_Functions_Mar61.pdf
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"Port-A-Punch". IBM Archives. IBM. 2003-01-23. Archived from the original on January 19, 2005. https://web.archive.org/web/20050119055829/http://www-03.ibm.com/ibm/history/exhibits/specialprod2/specialprod2_5.html
"Votomatic". IBM Archive. IBM. 2003-01-23. Archived from the original on February 26, 2006. https://web.archive.org/web/20060226172217/http://www-03.ibm.com/ibm/history/exhibits/supplies/supplies_5404PH12.html
"Votamatic". Verified Voting Foundation. Archived from the original on 7 August 2020. Retrieved 30 May 2015. https://web.archive.org/web/20200807000349/https://www.verifiedvoting.org/resources/voting-equipment/ess/votamatic/
"IBM Archives: Artifacts list for vol. 2". www.ibm.com. January 23, 2003. https://www.ibm.com/ibm/history/exhibits/attic2/attic2_room.html
Fierheller, George A. (2014). Do not fold, spindle or mutilate: the "hole" story of punched cards (PDF). Stewart Pub. p. 25. ISBN 978-1-894183-86-4. Archived (PDF) from the original on 2022-10-09. An accessible book of recollections (sometimes with errors), with photographs and descriptions of many unit record machines. 978-1-894183-86-4
"Type 070 vertical sorters". IBM Archives. IBM. 2003-01-23. Archived from the original on January 22, 2005. https://web.archive.org/web/20050122173526/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV2170.html
"(IBM) Hollerith 070 Vertical Sorter". IBM Archives. IBM. 2003-01-23. Archived from the original on January 14, 2005. https://web.archive.org/web/20050114202843/http://www-03.ibm.com/ibm/history/exhibits/attic3/attic3_034.html
"IBM Type 71 Vertical Sorter". IBM Archives. IBM. 2003-01-23. Archived from the original on January 14, 2005. https://web.archive.org/web/20050114202848/http://www-03.ibm.com/ibm/history/exhibits/attic3/attic3_084.html
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Type 80 Electric Punched Card Sorting Machine". IBM Archives. IBM. 2003-01-23. Archived from the original on January 19, 2005. https://web.archive.org/web/20050119221507/http://www-03.ibm.com/ibm/history/exhibits/attic3/attic3_136.html
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
IBM Sales Manual, DP Machines, page 1.20, May 1979
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
IBM 101 Electronic Statistical Machine, A22-0502-0
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Taube, Mortimer (1962). "M. Taube: Experiments with the IBM-9900 and a discussion of an improved Comac as suggested by these experiments". Journal of Chemical Documentation. 2: 22–26. doi:10.1021/c160004a007. /wiki/Doi_(identifier)
Jerry Norman. "The Coordinate and Uniterm Indexing Systems". http://www.historyofinformation.com/expanded.php?id=917
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
"IBM 77 electric punched card collator". IBM Archives. IBM. 2003-01-23. Archived from the original on September 9, 2006. https://web.archive.org/web/20060909184555/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV4004.html
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
"IBM 85 collator". IBM Archives. IBM. 2003-01-23. Archived from the original on February 7, 2008. https://web.archive.org/web/20080207213852/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV4014.html
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM 087". IBM Archives. IBM. 2003-01-23. Archived from the original on October 11, 2013. https://archive.today/20131011232932/http://www-03.ibm.com/ibm/history/exhibits/rochester/rochester_4013.html
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
Machine Methods of Accounting, IBM, 1936
Linnekin, Leroy Corliss (1938). The Scope of Punched Card Accounting. Boston University, College of Business Administration - Thesis. https://archive.org/details/scopeofpunchedca00linn
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
"IBM 514". IBM Archives. IBM. 2003-01-23. Archived from the original on March 10, 2007. https://web.archive.org/web/20070310203852/http://www-03.ibm.com/ibm/history/exhibits/rochester/rochester_4011.html
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Linnekin, Leroy Corliss (1938). The Scope of Punched Card Accounting. Boston University, College of Business Administration - Thesis. https://archive.org/details/scopeofpunchedca00linn
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Linnekin, Leroy Corliss (1938). The Scope of Punched Card Accounting. Boston University, College of Business Administration - Thesis. https://archive.org/details/scopeofpunchedca00linn
"IBM 523 gang summary punch". IBM Archives. IBM. 2003-01-23. Archived from the original on February 7, 2008. https://web.archive.org/web/20080207213847/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV4012.html
IBM 101 Electronic Statistical Machine, A22-0502-0
IBM Sales Manual. IBM. pages dated from 1963 to 1974
"IBM Operators' Guide" (PDF). IBM. A24-1010-0. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/A24-1010-0_IBM_Operators_Reference.pdf
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
"IBM Operators' Guide" (PDF). IBM. A24-1010-0. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/A24-1010-0_IBM_Operators_Reference.pdf
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM 550". IBM Archives. IBM. 2003-01-23. Archived from the original on January 19, 2005. https://web.archive.org/web/20050119055601/http://www-03.ibm.com/ibm/history/exhibits/attic/attic_178.html
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
Fierheller, George A. (2014). Do not fold, spindle or mutilate: the "hole" story of punched cards (PDF). Stewart Pub. p. 25. ISBN 978-1-894183-86-4. Archived (PDF) from the original on 2022-10-09. An accessible book of recollections (sometimes with errors), with photographs and descriptions of many unit record machines. 978-1-894183-86-4
"Hollerith tabulator and sorter". IBM Archives. IBM. 2003-01-23. Archived from the original on January 22, 2005. https://web.archive.org/web/20050122183033/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV2139.html
"IBM Archives: Artifacts list for vol. 1". www.ibm.com. January 23, 2003. https://www.ibm.com/ibm/history/exhibits/attic/attic_room.html
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
Machine Methods of Accounting, IBM, 1936
Machine Methods of Accounting, IBM, 1936
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Linnekin, Leroy Corliss (1938). The Scope of Punched Card Accounting. Boston University, College of Business Administration - Thesis. https://archive.org/details/scopeofpunchedca00linn
"IBM 285 electric accounting machine". IBM Archives. IBM. 2003-01-23. Archived from the original on January 1, 2007. https://web.archive.org/web/20070101115631/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV4005.html
Machine Methods of Accounting, IBM, 1936
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
"IBM 301 Accounting Machine". IBM Archives. IBM. 2003-01-23. Archived from the original on August 26, 2006. https://web.archive.org/web/20060826033153/http://www-03.ibm.com/ibm/history/exhibits/attic2/attic2_122.html
Linnekin, Leroy Corliss (1938). The Scope of Punched Card Accounting. Boston University, College of Business Administration - Thesis. https://archive.org/details/scopeofpunchedca00linn
Linnekin, Leroy Corliss (1938). The Scope of Punched Card Accounting. Boston University, College of Business Administration - Thesis. https://archive.org/details/scopeofpunchedca00linn
Pugh, Emerson W. (1995). Building IBM: Shaping and Industry and Its Technology. MIT Press. p. 50. ISBN 978-0-262-16147-3. 978-0-262-16147-3
Pugh (1995) pp.50–51
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
"The Naval Observatory Table Printer 1945". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tableprinter.html
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
IBM 402, 403 and 407; IBM 421, 444, 407 and 447 for World Trade Corporation; Computing Accounting Machines. IBM. A24-3475-0.
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
Fierheller, George A. (2014). Do not fold, spindle or mutilate: the "hole" story of punched cards (PDF). Stewart Pub. p. 25. ISBN 978-1-894183-86-4. Archived (PDF) from the original on 2022-10-09. An accessible book of recollections (sometimes with errors), with photographs and descriptions of many unit record machines. 978-1-894183-86-4
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
IBM 402, 403 and 407; IBM 421, 444, 407 and 447 for World Trade Corporation; Computing Accounting Machines. IBM. A24-3475-0.
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
Fierheller, George A. (2014). Do not fold, spindle or mutilate: the "hole" story of punched cards (PDF). Stewart Pub. p. 25. ISBN 978-1-894183-86-4. Archived (PDF) from the original on 2022-10-09. An accessible book of recollections (sometimes with errors), with photographs and descriptions of many unit record machines. 978-1-894183-86-4
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
IBM 402, 403 and 419 Accounting Machine. IBM. 22-5654-12.
"IBM Operators' Guide" (PDF). IBM. A24-1010-0. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/A24-1010-0_IBM_Operators_Reference.pdf
"IBM Operators' Guide" (PDF). IBM. A24-1010-0. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/A24-1010-0_IBM_Operators_Reference.pdf
IBM Sales Manual, 11-10-55
Catalog of Copyright Entries. Third Series: 1962: July–December By Library of Congress. Copyright Office, p.1517
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
"IBM 405 electric punched card accounting machine". IBM Archives. IBM. 2003-01-23. Archived from the original on September 11, 2006. https://web.archive.org/web/20060911183046/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV4006.html
"IBM Archives: Artifacts list for vol. 3, items I-L". www.ibm.com. January 23, 2003. https://www.ibm.com/ibm/history/exhibits/attic3/attic3_room2.html
IBM Operator's Guide. IBM. 1955. 22-8485-3.
Fierheller, George A. (2014). Do not fold, spindle or mutilate: the "hole" story of punched cards (PDF). Stewart Pub. p. 25. ISBN 978-1-894183-86-4. Archived (PDF) from the original on 2022-10-09. An accessible book of recollections (sometimes with errors), with photographs and descriptions of many unit record machines. 978-1-894183-86-4
IBM Sales Manual, 11-10-55
IBM Operator's Guide. IBM. 1955. 22-8485-3.
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
"IBM 407 accounting machine". IBM Archives. IBM. 2003-01-23. Archived from the original on January 1, 2007. https://web.archive.org/web/20070101062514/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV4007.html
IBM 402, 403 and 407; IBM 421, 444, 407 and 447 for World Trade Corporation; Computing Accounting Machines. IBM. A24-3475-0.
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
IBM Sales Manual, 1-2-57
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Archives: Endicott chronology - 1951-1959". www.ibm.com. January 23, 2003. https://www.ibm.com/ibm/history/exhibits/endicott/endicott_chronology1950.html
Based on references such as 407-408-409 in IBM Functional Wiring PRinciples A24-1007-0, the 409 is a version of the 407
IBM 402, 403 and 407; IBM 421, 444, 407 and 447 for World Trade Corporation; Computing Accounting Machines. IBM. A24-3475-0.
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
IBM 402, 403 and 407; IBM 421, 444, 407 and 447 for World Trade Corporation; Computing Accounting Machines. IBM. A24-3475-0.
"IBM Tabulators and Accounting Machines". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/tabulator.html
IBM 407 Accounting Machine. IBM. A24-1011-0.
"IBM Operators' Guide" (PDF). IBM. A24-1010-0. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/A24-1010-0_IBM_Operators_Reference.pdf
Fierheller, George A. (2014). Do not fold, spindle or mutilate: the "hole" story of punched cards (PDF). Stewart Pub. p. 25. ISBN 978-1-894183-86-4. Archived (PDF) from the original on 2022-10-09. An accessible book of recollections (sometimes with errors), with photographs and descriptions of many unit record machines. 978-1-894183-86-4
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
IBM 402, 403 and 407; IBM 421, 444, 407 and 447 for World Trade Corporation; Computing Accounting Machines. IBM. A24-3475-0.
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
Lars Poulsen collected a list of IBM unit record machine types and names.
"It was collected over a period of several years from the alt.folklore.computers USENET group. I started out with the ones I knew, and slowly people contributed more items, until we have what you see. I could not point you to a single—or even a few—lists with attributions; it was a community effort." – Lars Poulsen That list is here http://www.beagle-ears.com/lars/engineer/comphist/ibmmodel.txt
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
IBM Sales Manual. IBM. pages dated from 1963 to 1974
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
"IBM Card Equipment Summary" (PDF). 1957. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/Card_Equipment_Summary_Aug57.pdf
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
Linnekin, Leroy Corliss (1938). The Scope of Punched Card Accounting. Boston University, College of Business Administration - Thesis. https://archive.org/details/scopeofpunchedca00linn
IBM Sales Manual, DP Machines, page 1.20, May 1979
Fierheller, George A. (2014). Do not fold, spindle or mutilate: the "hole" story of punched cards (PDF). Stewart Pub. p. 25. ISBN 978-1-894183-86-4. Archived (PDF) from the original on 2022-10-09. An accessible book of recollections (sometimes with errors), with photographs and descriptions of many unit record machines. 978-1-894183-86-4
IBM Sales Manual, DP Machines, page 1.20, May 1979
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual. IBM. pages dated from 1963 to 1974
"IBM Machine Load Computer Slide Rule". National Museum of American History. Retrieved 2024-12-02. https://americanhistory.si.edu/collections/object/nmah_1381787
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
Bashe, Charles J.; et al. (1986). IBM's Early Computers. MIT. ISBN 978-0-262-02225-5. 978-0-262-02225-5
Bashe, Charles J.; et al. (1986). IBM's Early Computers. MIT. ISBN 978-0-262-02225-5. 978-0-262-02225-5
"IBM Calculators". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/calculator.html
"IBM Calculators". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/calculator.html
"IBM Relay Calculator". IBM Archives. IBM. 2003-01-23. Archived from the original on January 19, 2005. https://web.archive.org/web/20050119055441/http://www-03.ibm.com/ibm/history/exhibits/specialprod2/specialprod2_7.html
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Calculators". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/calculator.html
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Calculators". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/calculator.html
"IBM Archives: Artifacts list for vol. 3, items I-L". www.ibm.com. January 23, 2003. https://www.ibm.com/ibm/history/exhibits/attic3/attic3_room2.html
"IBM Calculators". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/calculator.html
"IBM 603 electronic multiplier". IBM Archives. IBM. 2003-01-23. Archived from the original on January 22, 2005. https://web.archive.org/web/20050122182222/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV2193.html
"IBM Calculators". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/calculator.html
"IBM Operators' Guide" (PDF). IBM. A24-1010-0. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/A24-1010-0_IBM_Operators_Reference.pdf
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Calculators". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/calculator.html
"IBM Calculators". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/calculator.html
"IBM Calculators". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/calculator.html
"Card-Programmed Calculator". IBM Archives. IBM. 2003-01-23. Archived from the original on January 22, 2005. https://web.archive.org/web/20050122184239/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV2198.html
"Card-Programmed Calculator". IBM Archives. IBM. 2003-01-23. Archived from the original on January 22, 2005. https://web.archive.org/web/20050122184239/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV2198.html
"IBM Calculators". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/calculator.html
Research, United States Office of Naval (1953). A survey of automatic digital computers. Office of Naval Research, Dept. of the Navy. p. 48. https://archive.org/details/bitsavers_onrASurveyomputers1953_8778395
"IBM Operators' Guide" (PDF). IBM. A24-1010-0. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/A24-1010-0_IBM_Operators_Reference.pdf
Meacham, Alan D. (1961). Data Processing Equipment Encyclopedia. Gille Associates. Book includes photos of some machines
"IBM Operators' Guide" (PDF). IBM. A24-1010-0. http://www.bitsavers.org/pdf/ibm/punchedCard/Training/A24-1010-0_IBM_Operators_Reference.pdf
"IBM Calculators". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/calculator.html
"IBM 608 calculator". IBM Archives. IBM. 2003-01-23. Archived from the original on January 22, 2005. https://web.archive.org/web/20050122185954/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV2214.html
IBM Sales Manual, DP Machines, page 1.20, May 1979
"IBM Calculators". www.columbia.edu. http://www.columbia.edu/cu/computinghistory/calculator.html
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual 1979 p.M 1.30
IBM WTC 212-9924-0
IBM WTC 212-9924-0
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual, DP Machines, page 1.20, May 1979
"International Time Recording Co. catalog" (PDF)., 1935 or earlier http://www.quissettshipclock.com/info/itrc.pdf
"IBM 1956: History of the Time Equipment Division and its Products" (PDF). Archived from the original (PDF) on September 14, 2006. https://web.archive.org/web/20060914172644/http://www-03.ibm.com/ibm/history/exhibits/cc/pdf/cc_2407TED1.pdf
"IBM: CONSOLIDATED LISTING OF IBM TIME & WEIGHING EQUIPMENT" (PDF). Archived from the original (PDF) on May 3, 2006. https://web.archive.org/web/20060503190457/http://www-03.ibm.com/ibm/history/documents/pdf/clocks.pdf
"IBM 1958: Press release announcing the sale of the domestic time equipment (clocks et al.) business to Simplex Time Recorder Company" (PDF). Archived from the original (PDF) on September 9, 2006. https://web.archive.org/web/20060909005625/http://www-03.ibm.com/ibm/history/exhibits/cc/pdf/cc_2407PR02.pdf
"Remote Control Keyboard". IBM Archives. IBM. 2003-01-23. Archived from the original on January 19, 2005. https://web.archive.org/web/20050119055817/http://www-03.ibm.com/ibm/history/exhibits/specialprod1/specialprod1_6.html
"IBM Model 01 electric typewriter". IBM Archives. IBM. 2003-01-23. Archived from the original on January 22, 2005. https://web.archive.org/web/20050122174951/http://www-03.ibm.com/ibm/history/exhibits/vintage/vintage_4506VV2240.html
"IBM Archives: IBM typewriter milestones". www.ibm.com. 2003-01-23. Retrieved 2022-11-20. https://www.ibm.com/ibm/history/exhibits/modelb/modelb_milestone.html
"IBM Archives: IBM typewriter milestones". www.ibm.com. 2003-01-23. Retrieved 2022-11-20. https://www.ibm.com/ibm/history/exhibits/modelb/modelb_milestone.html
"IBM Archives: IBM typewriter milestones". www.ibm.com. 2003-01-23. Retrieved 2022-11-20. https://www.ibm.com/ibm/history/exhibits/modelb/modelb_milestone.html
"IBM Archives: IBM typewriter milestones". www.ibm.com. 2003-01-23. Retrieved 2022-11-20. https://www.ibm.com/ibm/history/exhibits/modelb/modelb_milestone.html
"IBM Archives: IBM typewriter milestones". www.ibm.com. 2003-01-23. Retrieved 2022-11-20. https://www.ibm.com/ibm/history/exhibits/modelb/modelb_milestone.html
"IBM Archives: IBM typewriter milestones". www.ibm.com. 2003-01-23. Retrieved 2022-11-20. https://www.ibm.com/ibm/history/exhibits/modelb/modelb_milestone.html
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IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
IBM Sales Manual, DP Machines, page 1.20, May 1979
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IBM Sales Manual. IBM. pages dated from 1963 to 1974
IBM Sales Manual. IBM. pages dated from 1963 to 1974
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