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Reference.org
Telecommunications Access Method
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<p>Telecommunications Access Method (TCAM) is an <a href="/facts/Access_method/ITDHX6ag">access method</a>, in IBM's <a href="/facts/OS%2f360_and_successors/nQbdNbx6">OS/360 and successors</a> computer operating systems on <a href="/facts/IBM_System%2f360/7znvpy4K">IBM System/360</a> and later, that provides access to terminals units within a teleprocessing network. </p>