Special Real Time Operating System (SRTOS) is a discontinued
IBM real time operating system, originally designed for use in the
electricity industry, but later also applied in other areas of industrial
process control.
[Advances in Instrumentation: Proceedings of the ISA International Conference and Exhibit, Volume 43, Parts 1-4, Instrument Society of America, 1988, p. 104] It formed part of the Realtime Plant Management System (RPMS) and Advanced Control System (ACS).
[ IBM]
ADVANCED CONTROL SYSTEM VERSION 2 AND REALTIME PLANT MANAGEMENT SYSTEM
ZP86-0320, September 2, 1986 Rather than a standalone operating system, it was designed as an extension to the
OS/VS1
Operating System/Virtual Storage 1, or OS/VS1, is a discontinued IBM mainframe computer operating system designed to be run on IBM System/370 hardware. It was the successor to the Multiprogramming with a Fixed number of Tasks (MFT) option of Sys ...
and
OS/VS2 Operating System/Virtual Storage 2 (OS/VS2) is the successor operating system to OS/360 MVT in the OS/360
OS/360, officially known as IBM System/360 Operating System, is a discontinued batch processing operating system developed by IBM for thei ...
(later
MVS) operating systems.
It was also used in the paper industry.
[TAPPI Journal (Technical Association of the Pulp and Paper Industry), 1991, p. 270] SRTOS was originally released in 1976,
and though no longer supported as a program product, it is currently used as part of several ACS and RPMS installations worldwide.
References
{{IBM operating systems
IBM mainframe operating systems