| English | Thesaurus |
| Business Information System Program | BISP |
| Commonly Used System Program | CUSP (DEC) |
| Cooperative Computing System Program | CCSY (HP) |
| Defense Information System Security Program | DISSP (Mil., USA) |
| Defense Message System Transition Working Group | DMSTWG (organization, DMS, Mil., USA) |
| Modular System Program /7 | MSP/7 (OS, IBM) |
| Multitasking System Program | MSP (OS, Hemenway) |
| Operating System / Primary Control Program | OSPCP (IBM, OS, OS/360, Vorlaeufer) |
| Operating System / Primary Control Program | OS/PCP (IBM, OS, OS/360, Vorlaeufer) |
| Remote System Services Control Point | RSSCP (SSCP) |
| Set System Mask | SSM |
| System and Network Administration Program | SNAP |
| System Control Program | SCP (OS) |
| System Services Control Point | SSCP (NAU, SNA, SSCP) |
| System Services Control Point Network Services | SSCPNS (SSCP) |
| System Support Program | SSP (OS, IBM) |
| System Training Program | STP |
