Control Program Facility
|Platforms||IBM System/38 minicomputer|
|Default user interface||Command-line interface|
A database management system was integrated with the operating system.
Description of the libraries
- QGPL – general purpose library
- QSYS – system library
- QSPL – spooling library
- QTEMP – temporary library
- QSRV – system service library
- QRECOVERY – system recovery library
In most computers prior to the System/38, and most modern ones, data stored on disk was stored in separate logical files. When data was added to a file it was written in the sector dedicated to this, or if the sector was full, on a new sector somewhere else.
The System/38 adopted the single-level store architecture, where main storage and disk storage are organized as one, from the abandoned IBM Future Systems project (FS). Every piece of data was stored separately and could be put anywhere on the system. There was no such thing as a physically contiguous file on disk, and the operating system managed the storage and recall of all data elements.
System/38 was one of the few commercial computers with capability-based addressing. (The earlier Plessey 250 was one of the few other computers with capability architecture ever sold commercially.) Capability-based addressing was removed in the follow-on AS/400 and iSeries models. Capability-based operating system refers to an operating system that uses capability-based security.
- Mark Smotherman. "IBM Future System (FS) - 1970s". Retrieved October 11, 2017.
- Soltis, Frank G. (July 2001). Fortress Rochester: The Inside Story of the IBM ISeries. 29th Street Press. p. 119. ISBN 978-1-58304-083-6..