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IBM System/3
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===Operator Console Facility=== The System/3 Operator Console Facility (OCF) consisted of either a modified [[IBM Selectric typewriter]] interfaced into the computer, or a special purpose [[IBM 3270]] display. Within the OCF, there was capability to 'cancel' processes and/or tasks that were running, including either partition (P1 or P2). The system could only run two programs simultaneously, except for the model 15 or systems running the Communications Control program, CCP. The CCP was a system control programming feature that allowed to support an online network of [[Computer terminal|terminal]]s.
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