time-sharing
History of CP/CMS, IBM's virtual machine operating system (CP) that supported time-sharing (CMS). IBM M44/44X, an experimental computer system based on an IBM 7044 used to simulate multiple virtual machines. Project MAC, a DARPA funded project at MIT famous for groundbreaking research in operating systems, artificial intelligence, and the theory of computation. TELCOMP, an interactive, conversational programming language based on JOSS, developed by BBN in 1964. Timeline of operating systems
VAX (Virtual Address eXtension), a computer architecture and family of computers developed by DEC.