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IBM 1800 Data Acquisition and Control System
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<p>The IBM 1800 Data Acquisition and Control System (DACS) was a <a href="/facts/Process_control/tmjQhchm">process control</a> variant of the <a href="/facts/IBM_1130/zQ9Acd05">IBM 1130</a> with two extra instructions (CMP and DCM), extra I/O capabilities, 'selector channel like' cycle-stealing capability and three hardware index registers. </p><p>IBM announced and introduced the 1800 Data Acquisition and Control System on November 30, 1964, describing it as "a computer that can monitor an assembly line, control a steel-making process or analyze the precise status of a missile during test firing." </p>