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UNIX System Services
| Developer | IBM |
|---|---|
| OS family | UNIX - POSIX |
| Working state | Current |
| Source model | Closed source |
| Initial release | 1998[1] (Name changed from OpenEdition to OS/390 UNIX System Services) |
| Latest release | Version 3.1 (V3R1) / September 29, 2023 |
| Marketing target | Enterprise / Mainframes |
| Available in | English and most other languages |
| Platforms | z/Architecture |
| License | Proprietary |
| Official website | z/OS UNIX System Services |
| History of IBM mainframe operating systems |
|---|
z/OS UNIX System Services (z/OS UNIX, or informally USS) is a base element of z/OS.[2] z/OS UNIX is a certified UNIX operating system implementation (XPG4 UNIX 95) optimized for mainframe architecture. It is the first UNIX 95 to not be derived from the AT&T source code. Through integration with the rest of z/OS, additional Time Sharing Option (TSO) commands are available alongside the usual UNIX services, making it possible to process UNIX files using ISPF. Extensions in JCL make it possible to use these files in batch processing.
- ^ "UNIX System Services z/OS Version 1 Release 7 Implementation" (PDF). Software Support Manual. IBM. March 2006. SG24-7035.
Name changed from OpenEdition to OS/390 UNIX System Services
- ^ "z/OS base elements". ibm.com.
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