Special Real Time Operating System (SRTOS) is a discontinued

IBM International Business Machines Corporation (using the trademark IBM), nicknamed Big Blue, is an American Multinational corporation, multinational technology company headquartered in Armonk, New York, and present in over 175 countries. It is ...

real time operating system A real-time operating system (RTOS) is an operating system (OS) for real-time computing applications that processes data and events that have critically defined time constraints. A RTOS is distinct from a time-sharing operating system, such as Unix ...

, originally designed for use in the

electricity industry The electric power industry covers the electricity generation, generation, electric power transmission, transmission, electric power distribution, distribution and electricity retailing, sale of electric power to the general public and industry. ...

, but later also applied in other areas of industrial

process control Industrial process control (IPC) or simply process control is a system used in modern manufacturing which uses the principles of control theory and physical industrial control systems to monitor, control and optimize continuous Industrial processe ...

.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). 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 (later

MVS Multiple Virtual Storage, more commonly called MVS, is the most commonly used operating system on the System/370, System/390 and IBM Z IBM mainframe computers. IBM developed MVS, along with OS/VS1 and SVS, as a successor to OS/360. It is unr ...

) 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