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HP Multi-Programming Executive
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<p>MPE (Multi-Programming Executive) is a discontinued business-oriented <a href="/facts/Mainframe_computer/nrBR6rWa">mainframe computer</a> <a href="/facts/Real-time_computing/p9HxgL4L">real-time</a> <a href="/facts/Operating_system/8XTuvMh2">operating system</a> developed by <a href="/facts/Hewlett-Packard/abuNSYNu">Hewlett-Packard</a> for their <a href="/facts/HP_3000/JFcG25Fv">HP 3000</a> computers. While the HP 3000s were initially mini-mainframes, the final high-end systems supported 12 <a href="/facts/Central_processing_unit/Jxp1bqMV">CPUs</a> and over 2000 simultaneous users. </p>