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Multiple Console Time Sharing System
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<p>The Multiple Console Time Sharing System (MCTS) was an <a href="/facts/Operating_system/8XTuvMh2">operating system</a> developed by <a href="/facts/General_Motors_Research_Laboratories/xGGxC9Lh">General Motors Research Laboratories</a> in the 1970s for the <a href="/facts/Control_Data_Corporation/ChfGgfPM">Control Data Corporation</a> <a href="/facts/CDC_STAR-100/tH5kopJY">STAR-100</a> supercomputer. MCTS was built to support GM's <a href="/facts/Computer-aided_design/5gSXrmmN">computer-aided design</a> (CAD) applications. </p><p>MCTS was designed starting in 1968. It was written in a high-level <a href="/facts/Systems_programming_language/KogoSQVR">systems programming language</a> "Malus", a dialect of <a href="/facts/PL/I/469mVYgd">PL/I</a>. A superset of Malus called <a href="/facts/Apple_(programming_language)/XMssM5zt">Apple</a> became the primary application language. </p><p>MCTS was based on <a href="/facts/Multics/y7A5peyu">Multics</a>. All access to data was through the <a href="/facts/Virtual_memory/Lw2GemF5">virtual memory</a> system. Only the system paging support module was concerned about the physical location of the data. </p>