UNIVAC - Operating Systems

Operating Systems

The 1107 was the first 36-bit, word-oriented machine with an architecture close to that which came to be known as that of the "1100 Series." It ran the EXEC II operating system, a batch-oriented second-generation operating system, typical of the early to mid-1960s. The 1108 ran EXEC II and EXEC 8. EXEC 8 allowed simultaneous handling of real-time applications, time-sharing, and background batch work. TIP, a transaction-processing environment, allowed programs to be written in COBOL whereas similar programs on competing systems were written in assembly language. On later systems, EXEC 8 was renamed OS 1100 and OS 2200, with modern descendants maintaining backwards compatibility. Some more exotic operating systems ran on the 1108—one of which was RTOS, a more bare-bones system designed to take better advantage of the hardware.

The affordable System 80 series of small mainframes ran the OS/3 operating system which originated on the Univac 90/30 (and later 90/25, and 90/40).

The UNIVAC 90/60 Series first ran with Univac developed OS/9, which was later replaced by RCA's Virtual Memory Operating System (VMOS). RCA originally called this operating system Time Sharing Operating System (TSOS), running on RCA's Spectra 70 line of virtual memory systems and changed its name to VMOS before the Sperry acquisition of RCA CSD. After VMOS was ported to the 90/60, Univac renamed it VS/9.