Conversational Monitor System

The Conversational Monitor System (CMS; originally: "Cambridge Monitor System") is a relatively simple interactive computing single-user operating system.

  • CMS is part of IBM's VM family, which runs on IBM mainframe computers. VM was first announced in 1972, and is still in use today (cf. z/VM).
  • CMS was originally developed as part of IBM's CP/CMS operating system, which went into production use in 1967.

CMS runs as a "guest" operating system in a private virtual machine created by the VM control program. The control program plus CMS together create a multi-user time-sharing operating system.

Read more about Conversational Monitor System:  History, Architecture, Features

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