Virtual Machine/Basic System Extensions Program Product (BSEPP or VM/SE).PRIMOS (written in FORTRAN IV, that didn't have pointers, while later versions, around version 18, written in a version of PL/I, called PL/P).Operating System/Virtual Storage 2 R1 (OS/VS2 SVS).
Operating System/Virtual Storage 1 (OS/VS1).RSTS-11 2A-19 ( First released version PDP-11).Multics (MIT, GE, Bell Labs for the GE-645 and later the Honeywell 6180) ( opened for paying customers in October ).Unics (later Unix) (AT&T, initially on DEC computers).TENEX (Bolt, Beranek and Newman for DEC systems, later TOPS-20).THE multiprogramming system (Eindhoven University of Technology) publication.WAITS (SAIL, Stanford Artificial Intelligence Laboratory, time-sharing system for DEC PDP-6 and PDP-10, later TOPS-10).TSS/360 (IBM's Time-sharing System for the S/360-67, never officially released, canceled in 1969 and again in 1971).ORVYL (Stanford University's time-sharing system for the IBM S/360).ITS (MIT's Incompatible Timesharing System for the DEC PDP-6 and PDP-10).Michigan Terminal System (MTS) (time-sharing system for the IBM S/360-67 and successors).CP-40, predecessor to CP-67 on modified IBM System/360 Model 40.OS/360 (IBM's primary OS for its S/360 series) PCP and MFT ( shipped).Multics (MIT, GE, Bell Labs for the GE-645) ( announced).THE multiprogramming system (Technische Hogeschool Eindhoven) development.PDP-6 Monitor (DEC) descendant renamed TOPS-10 in 1970.OS/360 (IBM's primary OS for its S/360 series) ( announced).Dartmouth Time Sharing System (Dartmouth College's DTSS for GE computers).Berkeley Timesharing System (for Scientific Data Systems' SDS 940).KDF9 Timesharing Director (English Electric) – an early, fully hardware secured, fully pre-emptive process switching, multi-programming operating system for KDF9 (originally announced in 1960).Titan Supervisor, early time-sharing system begun.JOSS, an interactive time-shared system that did not distinguish between operating system and language.CTSS becomes operational (MIT's Compatible Time-Sharing System for the IBM 7094).