IBM 7090/94 IBSYS

IBSYS is the name of a discontinued

IBSYS itself is a resident monitor program, that reads control card images placed between the decks of program and data cards of individual jobs. An IBSYS control card^[a] begins with a "$" in column 1, immediately followed by a Control Name that selects the various IBSYS utility programs needed to set up and run the job. These card deck images are usually read from magnetic tapes prepared offline, not directly from the card reader.

IBJOB Processor

The IBJOB Processor is a subsystem that runs under the IBSYS System Supervisor. It reads control cards that request, e.g., compilation, execution. The languages supported include

See also

• University of Michigan Executive System
• Timeline of operating systems

Further reading

• Noble, A. S. Jr., "Design of an integrated programming and operating system", IBM Systems Journal, June 1963. "The present paper considers the underlying design concepts of IBSYS/IBJOB, an integrated programming and operating system. The historical background and over-all structure of the system are discussed. Flow of jobs through the IBJOB processor, as controlled by the monitor, is also described."
• "IBM 7090/7094 IBSYS Operating System Version 13 System Monitor (IBSYS)", Form C28-6248-7
• "IBM 7090/7094 IBSYS Operating System Version 13 IBJOB Processor", Form C28-6389-1
• "IBM 7090/7094 IBSYS Operating System Version 13 IBJOB Processor Debugging Package", Form C28-6393-2

Notes

External links

• IBM 7090/94 IBSYS Operating System, Jack Harper
• Dave Pitts' IBM 7090 support
• IBSYS source archived with Bitsavers
• History of FORTRAN and FORTRAN II – FORTRAN II and other software running on IBSYS, Software Preservation Group, Computer History Museum

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