| Subject | English | Thesaurus |
| mil., abbr. | ABIC Program Support System | APSS |
| abbr., telecom. | ACD system | automatic call distribution system |
| mil., abbr. | Acquisition Systems Protection Program | ASPP |
| abbr., scottish | Advanced Deployable Systems program | ADS (US Navy) |
| abbr., scottish | Advanced Pilotage System Program | APSP (USA) |
| abbr., astronaut. | Advanced Research in Telecommunications Systems ESA Programme | ARTES |
| abbr., astronaut. | Advanced Systems and Technology Programme | ASTP (ESA) |
| energ.ind., abbr. | Advanced Turbine Systems Program | ATSP |
| Nasdaq, abbr. | Affinity International Travel Systems | AFFT |
| USA | Aircraft Certification Systems Evaluation Program | ACSEP |
| st.exch., abbr. | American Computerized Commodity Exchange System And Services | ACCESS |
| invest., abbr. | Amex Options Switching System | AMOS |
| transp., abbr. | Approach Lighting System Improvement Program | ALSIP |
| abbr., scottish | Armored Systems Modernization program | ASM (US Army) |
| mil., abbr. | Army Acquisition Executive Program Control Central System | AAEPCS |
| mil., abbr. | Army Aviation System Program Review | AASPR |
| mil., abbr. | Army Data Services and Administration Systems Command | ADSC |
| abbr., scottish | Artillery Systems Research Programme | ASRP |
| abbr., post | Auto Dispatch System for Registered Mail | ASDRM |
| abbr. | Auto Program Search System | APSS |
| mil., abbr. | Automated Data Processing System Security Program | ADPSSP |
| abbr., scottish | Automated Deep Operations Co-ordination System | ADOCS |
| mil., abbr. | Automated Information System Security Assessment Program | AISSAP |
| IT, abbr. | Automated Program Management information System | APMS |
| mil., abbr. | automated radar terminal system ARTREP, Army training and evaluation program | ARTS |
| comp., abbr. | Automated System Adjustment Program | ASAP |
| st.exch., abbr. | BEA Systems, Inc. options | VZP |
| mil., abbr. | BMEWS system program office | BSPO |
| mil., abbr. | Board of Directors, NATO Maintenance Supply Services System | BDNMSSS |
| IT, abbr. | Business Information System Program | BISP |
| st.exch., abbr. | Cabletron Systems, Inc. options | VIW |
| abbr., IT | CD File System | CDFS |
| abbr., comp., net. | CD-ROM File System | CDFS |
| mil., abbr. | Client Server Environment-System Services | CSE-SS |
| mil., abbr. | Close Combat Light Systems Program Review | CCLSPR |
| O&G, abbr. | CO2 fixed type extinguishing system | CO2 |
| ocean., abbr. | Coastal Ocean Prediction Systems Program | COPS |
| abbr., astronaut., mil. | Combat Control System Improvements Program | CCSIP |
| mil., abbr. | Command and Control System Program Review | C2SPR |
| abbr., file.ext. | Common Management Information Services/System | CMIS |
| IT, abbr. | Commonly Used System Program | CUSP (DEC) |
| abbr. | Commonly-Used System Program | CUSP (Vosoni) |
| abbr., scottish | Communications System Segment Replacement programme | CSSR (USAF) |
| st.exch., abbr. | Computer-assisted Order Routing and Execution System for Options | CORESO |
| mil., abbr. | Consolidated Program and Budgeting System | CPBS |
| abbr., file.ext. | Continuous System Modelling Program | CSMP |
| IT, abbr. | Cooperative Computing System Program | CCSY (HP) |
| abbr., file.ext. | Cooperative Library Agency for Systems and Services | CLASS |
| abbr., scottish | Co-ordination & Warning System | CWS (Denmark) |
| abbr., file.ext. | Co-Processing Node Architecture for Parallel Systems | CNAPS |
| abbr., scottish | Countermeasures And Weapon Systems Engagement Model programme | CAWSEM (UK) |
| abbr., scottish | Crisis Response Operations in NATO Open Systems programme | CRONOS |
| abbr., post | Customer Services Management Data System | CSMDS |
| IT, abbr. | Dedicated Office Systems and Services | DOSS |
| el., abbr. | Defence Systems Application Program | DSAP |
| IT, abbr. | Defense Information System Security Program | DISSP (Mil., USA) |
| USA | Defense Information Systems Network - Leading Edge Services | DISN-LES |
| mil., abbr. | Defense Information Systems Security Program | DISSP |
| mil., abbr. | Defense Information Systems Technical Service Program | DISTSP |
| IT, abbr. | Defense Message System Transition Working Group | DMSTWG (organization, DMS, Mil., USA) |
| abbr., mil., WMD | Defense Occupational Health Readiness System Program Manager | DOHRS PM |
| mil., abbr. | Defense Satellite Communications System Service Life Enhancement Program | DSC-SLEP |
| mil., abbr. | Defense Satellite Communications Systems Application Program | DSAP |
| abbr., astronaut., mil. | Defense-wide Information System Security Program | DISSP |
| abbr., scottish | Defense-wide Information Systems Security Program | DISSP (USA) |
| abbr., astronaut., mil. | Defensive System Upgrade Program | DSUP |
| abbr., mil., WMD | Deputy Director Acquisition Policy and Program Integration for Acquisition Systems Management, Office of the Under Secretary of Defense for Acquisition | Dep Dir, ASM |
| mil., abbr. | Direct Reporting Program Manager for Strategic Systems Programs | DRPM SSP |
| USA | Directorate Of Information Systems And Services | DISS |
| energ.ind., abbr. | Distributed Generation Systems Program | DGSP |
| abbr., astronaut., mil. | DoD Information System Security Program | DISSP |
| ecol., abbr. | Earth Resources Observational System Program | EROS |
| abbr., progr. | enabling system services | enabling services (ssn) |
| abbr., scottish | Enhanced System Improvement Program | ESIP (US Army) |
| abbr. | Formal Verification Systems Evaluation Program | FVSEP (Vosoni) |
| abbr., post | Global Business System Dispatch | GBS-D (2007, part of GBS) |
| abbr., scottish | GTE International Systems Co. | GTEISC (USA) |
| abbr., scottish | Headquarters System Replacement Program | HSRP (USA) |
| abbr., avia. | High Intensity Approach Lighting System | HIALS (Interex) |
| abbr., scottish | High Intensity Laser Missile Defence System | HILMDS |
| mil., abbr. | Howitzer Improvement Program On Board Fire Control System | HIP OBFCS |
| meteorol., abbr. | Improved Weather Reconnaissance System Program Council | IWRPC |
| abbr. | Information Systems and Services | ISS (информационные системы и услуги Oleg Sollogub) |
| abbr. | Information Systems and Services | IS&S (информационные системы и услуги Oleg Sollogub) |
| abbr., commun. | Information Systems / Integrated Services | IS |
| mil., abbr. | Information Systems Quality Program | ISQP |
| USA | Inspection Services Information System | ISIS |
| abbr., astronaut. | Integrated Global Ocean Services System | IGOSS |
| mil., abbr. | Integrated Survey Program Data Collection System | ISP DCS |
| IT, abbr. | Integrated Systems and Information Services | ISIS (OS, Intel) |
| abbr., file.ext. | Integrated Systems and Information Services | ISIS |
| abbr., file.ext. | Interactive Continuous Systems Modeling Program | ICSMP |
| ecol., abbr. | International Solar System Program | ISSP |
| abbr., scottish | Joint Services Imagery Exploitation System | JSIES (UK armed forces) |
| mil., abbr. | Joint Services Imagery Processing System | JSIPS |
| abbr., scottish | Joint Services Interior Intrusion Detection System | JSIIDS (USA) |
| mil., abbr. | Joint System Program Office | JSPO |
| mil., abbr. | Joint Worldwide Military Command and Control Information System Program | JWIS |
| abbr., scottish | Land Operations Command Systems programme | LOCS (British Army) |
| abbr. | Laser Ablation Mask System | LAMS (Александр Рыжов) |
| abbr., scottish | Learning System Pilot Aiding programme | LSPA (USAF) |
| abbr., commun. | Local Services Management System | LSMS |
| abbr., scottish | Lockheed Aeronautical Systems Co. | LASC (USA) |
| abbr., file.ext. | Logistics System Program Review | LSPR |
| abbr., scottish | Low Intensity Conflict Aircraft System | LICAS |
| abbr. | Machine Readable Telegraphic Input Money Transfer System | MARTI (Vosoni) |
| mil., abbr. | Major Automated Information System Acquisition Program | MAISAP |
| ecol., abbr. | Marine Meteorological Services System | MMSS |
| IT, abbr. | Master Control Program/Advanced System | MCPAS |
| abbr. | Master Control Program/Advanced System | MCP/AS |
| aeron., abbr. | Maximum Intensity Approach Light System | MALS |
| abbr., scottish | McDonnell Douglas Missile Systems Co. | MDMSC (USA) |
| abbr., scottish | McDonnell Douglas Space Systems Co. | MDSSC (USA) |
| abbr., file.ext. | Medical Information Systems Program | MISP |
| abbr., scottish | Medium Intensity Approach Light System | MALS |
| transp., abbr. | Medium Intensity Approach Light System With Rail | MALSR |
| transp., abbr. | Medium Intensity Approach Light System With Sequenced Flashing Lights | MALSF |
| st.exch., abbr. | Mercury Computer Systems options | QYR |
| abbr., post | Mil International Dispatch & Accountability System | MIDAS |
| mil., abbr. | Military Health Services System | MHSS |
| abbr., scottish | Mirage System Improvement Programme | MirSIP (Belgium) |
| mil., abbr. | Missile Master System Training Program | MMSTR |
| IT, abbr. | Modular System Program /7 | MSP/7 (OS, IBM) |
| comp., abbr. | Multiple Virtual System Configuration Program | MVSCP |
| IT, abbr. | Multitasking System Program | MSP (OS, Hemenway) |
| account., abbr. | National Information Services And Systems | NISS |
| abbr. | National Information Services & Systems | NISS (ABelonogov) |
| abbr., scottish | NATO AEW System Improvement Programme | NASIP |
| abbr., scottish | Naval Air System Program Office | NASPO (USA) |
| mil., abbr. | Naval Air System Program Office | NASPO |
| abbr., scottish | Naval Combat System LAN Technology Demonstrator Programme | NCSLANTDP (UK MoD) |
| tech., abbr. | Non-Proliferation Alternative System Assessment Program | NASAP |
| abbr. | North American Automated Systems co. | NAAS |
| st.exch., abbr. | Objective Systems Integrator options | UQJ |
| mil., abbr. | OBU Program Upgrade System | OPUS |
| abbr., file.ext. | Octal Program Updating System | OPUS |
| IT, abbr. | Operating System / Primary Control Program | OSPCP (IBM, OS, OS/360, Vorlaeufer) |
| IT, abbr. | Operating System / Primary Control Program | OS/PCP (IBM, OS, OS/360, Vorlaeufer) |
| ocean., abbr. | Operations System Development Program | OSDP |
| telecom., abbr. | Operator Services System | OSS |
| abbr., scottish | Optical Backplane Interconnect System programme | OBIS (US Navy) |
| busin., abbr. | Options Automated Trading System | OATS |
| busin., abbr. | Options Margining System | OMS |
| st.exch., abbr. | OSI Systems, Inc. Options | UOJ |
| st.exch., abbr. | Pacific Options Exchange Trading System | POETS |
| abbr., file.ext. | Personal Communication Services/System | PCS |
| abbr., scottish | Phased Armaments Programme Systems | PAPS |
| mil., abbr. | Program Executive Officer - Command and Control System | PEO-CCS |
| abbr., scottish | Program for Avionics & Weapon Systems | PAWS (USA) |
| busin., abbr. | Program Information Online System | PIOS |
| USA | Program Information Tracking System | PITS |
| mil., abbr. | Program Management Performance Tracking System | PMPTS |
| mil., abbr. | Program Manager, Multi-Service Communications System | PMMSCS |
| abbr., scottish | Program Manager, Tank Main Armament Systems | PM-TMAS (US Army) |
| abbr., mil., WMD | Program Performance and Budget Execution Review System | PPBERS |
| account., abbr. | Program Planning and Budgeting System | PPBS |
| abbr., qual.cont. | Program Reliability Information System for Management | PRISM |
| energ.ind., abbr. | Programme of the European Union Research Fluidized Combustor Systems | RFCS |
| abbr., scottish | Programme Planning & Budgeting System | PPBS |
| mil., abbr. | Protective Mask Fit Validation System | PMFVS |
| abbr., water.suppl. | Public Water System Supervision Program | PWSSP |
| busin., abbr. | Qualified Information Systems Vendors program | QISV |
| abbr., mil., WMD | Quality System Program Plan | QSPP |
| abbr., scottish | Radar Sensitivity / System Improvement Program | RSIP (USA) |
| astronaut., abbr. | Radiation Intensity Meaning System | RIMS |
| abbr., scottish | Re-entry Systems Launch Program | RSLP (USA) |
| IT, abbr. | Remote System Services Control Point | RSSCP (SSCP) |
| mil., abbr. | SAGE system training program | STP |
| abbr., O&G, sahk.r. | SE Document Management System | SE DMS |
| abbr. | Selective Co-operative Secondary Surveillance System | Mode S (MichaelBurov) |
| abbr., astronaut., mil. | Sensor System Improvement Program | SSIP |
| abbr., scottish | Sensor System Improvement Program | SSIP (USA) |
| abbr., scottish | Sensor Technology for Affordable IR Systems programme | STAIRS (UK) |
| abbr., scottish | Services Air Cargo System | SACS (UK) |
| abbr., scottish | Services Information Management System | SIMS |
| mil., abbr. | Services Systems Acquisition Review Council | SSARC |
| IT, abbr. | Set System Mask | SSM |
| abbr., tech. | Shuttle Program Information Management System | SPIMS (Vosoni) |
| abbr., scottish | Soldier As A System programme | SAAS (US Army) |
| abbr., telecom. | SPC system | stored-program control system |
| telecom., abbr. | Stored Program Control System | SPCS |
| IT, abbr. | Stored Program Control Systems | SPCS |
| abbr., el. | stored-program electronic switching system | SPESS (система электронной коммутации с микропрограммным управлением ssn) |
| abbr., astronaut., mil. | Strategic Systems Programs | SSP |
| abbr., astronaut., mil. | System Acquisition Support Services | SASS |
| abbr., softw. | System Analysis and Program Development | SAP (bigmaxus) |
| IT, abbr. | System and Network Administration Program | SNAP |
| comp., abbr. | System Application Program | SAP |
| abbr., file.ext. | System Assurance Program | SAP |
| IT, abbr. | System Control Program | SCP (OS) |
| abbr., file.ext. | System Control Program | SCP |
| abbr., scottish | System Co-ordinating Installation Design Authority | SCIDA |
| abbr., scottish | System Enhancement Package/Program | SEP (US DoD) |
| abbr., astronaut., mil. | System Enhancement Program | SEP |
| mil., abbr. | System Enhancement Program | SIP |
| abbr., astronaut., mil. | System Improvement Program | SIP |
| abbr., scottish | System Improvement Programme | SIP |
| comp., abbr. | System Modification Program | SMP |
| mil., abbr. | System Program Description | SPD |
| abbr., mil., commer. | System Program Director | SPD (Air Force) |
| abbr., scottish | System Program Director | SPD (USA) |
| abbr. | System Program Management | SPM |
| abbr., mil., commer. | System Program Manager | SPM (Air Force) |
| abbr., mil., WMD | System Program Manager | SPM |
| abbr., scottish | System Program Office | SPO (USA) |
| tech., abbr. | System Program Office | SPO |
| abbr., mil., commer. | System Program/Project Office | SPO (Air Force) |
| busin., abbr. | System Quality Services | SQS |
| abbr., mil., WMD | System Safety Program | SSP |
| progr. | system/service uptime monitor | service uptime monitor (ssn) |
| abbr., IT | System Services Control Point | SSCP |
| IT, abbr. | System Services Control Point | SSCP (NAU, SNA, SSCP) |
| telecom., abbr. | System Services Control Point | SSCP (SNA) |
| IT, abbr. | System Services Control Point Network Services | SSCPNS (SSCP) |
| comp., net., abbr. | System Services Interface | SSI |
| IT, abbr. | System Support Program | SSP (OS, IBM) |
| IT, abbr. | System Training Program | STP |
| comp., net., abbr. | System Update Services | SUS |
| abbr., astronaut., mil. | System Weapons Improvement Program | SWIP |
| abbr., scottish | Systems Acquisition Support Services | SASS |
| abbr., comp., net. | Systems Network Architecture Distributed Services | SNADS |
| abbr., comp., net. | Systems Network Architecture/Management Services | SNA/MS |
| abbr., file.ext. | Systems Services and Technology | SST |
| abbr., scottish | Systems Technology Programme | STP |
| abbr., scottish | Systems Weapons Improvement Program | SWIP (US DoD) |
| abbr., scottish | TAC Co-ordinator Automated Command & Control Information System | TACACCIS (USA) |
| mil., abbr. | Technical Program Integration Office for the Army Battlefield Command System | TPIOABCS |
| mil., abbr. | Technical Program Integration Office for the Army Battlefield Command System | TPIO |
| mil., abbr. | Theater Army Repair Program Maintenance Management System | TARPMMS |
| IT, abbr. | Total On-Line Program and Information Control System | TOPICS |
| NYSE., abbr. | Total System Services, Inc. | TSS |
| water.suppl., abbr. | United Nations Development Program/Global Environment Monitoring System | UNDP/GEMS |
| comp., abbr. | Unix System Services | USS |
| abbr. | User Services and Systems Support | USSS |
| abbr., scottish | Vehicle Integrated Defense System programme | VIDS (USA) |
| abbr., scottish | Weapon System Evaluation Programme | WSEP |
| mil., abbr. | Weapon System Support Program | WSSP |
| abbr., scottish | Weapon System Support Programme | WSSP |
| mil., abbr. | Weapons Evaluation System Program | WESP |
| mil., abbr. | Weapons System Acquisition Program | WSAP |
| abbr., scottish | Weapons System Improvement Programme | WSIP |
| comp., abbr. | Web Engineered Systems and Services | WESS |
| abbr., scottish | Westinghouse Electronic Systems International Marketing Co. | WESIM (USA) |
| abbr., file.ext. | Windows Open Services/Systems Architecture | WOSA (Microsoft) |
| ocean., abbr. | World Climate System Monitoring Program | WCSMP |
| IT, abbr. | Xerox Network Services / Systems / Standard | XNS (Xerox, XNS) |
| abbr., office.equip. | Xerox Services for Unix Systems | XSUS (translator911) |
