| SRCBD | Software Requirements Change Board Directive | In English | |
| SREM | Software Requirements Methodology | In English | |
| SRN | Software Release Notice | In English | |
| SRR | Software Requirements Review | In English | → Quality management |
| SRS | Software Requirements Specification | In English | → Quality management |
| SS | System Software | In English | |
| SSA | Software Support Agency | In English | |
| SSA | Software Safety Analysis | In English | |
| SSAD | Software System Analysis Document | In English | |
| SSCR | Support Software Change Request | In English | |
| SSD | Spacecraft Software Division | In English | → Spaceflight engineering, astronautics |
| SSDD | Software System Design Document | In English | |
| SSE | Software Support Environment | In English | |
| SSE | Software Support Equipment | In English | |
| SSEDF | Software Support Environment Development Facility | In English | |
| SSES | Software System Environment System | In English | |
| SSIP | System Software Interface Processing | In English | → Human-computer interaction |
| SSL | System Software Loader | In English | |
| SSML | Speech Synthesis Markup Language | In English | → Programming languages → Data |
| SSO | Single Sign-On | In English | |
| SSO | Systems Software Office | In English | |
| SSP | Standard Switch Panel | In English | |
| SSPF | Space Shuttle Programming Facility | In English | → Spaceflight engineering, astronautics |
| SSPM | Software Standards and Procedures Manual | In English | |
| SSR | Software Specification Review | In English | |
| SSRN | System Software Reference Number | In English | |
| SSS | Spacecraft Software System | In English | → Spaceflight engineering, astronautics |
| STAR | Software Tools And Requirements | In English | |
| STARS | Software Technology for Adaptable and Reliable Systems | In English | |
| STD | Software Test Description | In English | |
| STIL | Software Test and Integration Laboratory | In English | → Research institutes |
| STL | Sciences et Techniques du Logiciel | In French | |
| STLDD | Software Top-Level Design Document | In English | |
| STN | Software Trouble Note | In English | |
| STOICAL | STack Oriented Interactive Compiler Adapted to Linux | In English | → Operating systems |
| STP | Software Test Procedure | In English | |
| STP | Software Test Plan | In English | |
| STP | Software Technology Program | In English | |
| STR | Software Test Report | In English | |
| SUL | Software Utilization List | In English | |
| SUM | Software User's Manual | In English | |
| SVICP | Shock Vibration Information Center - Shock Vibration Computer Programs | In English | → Serial publications, periodicals → Acoustics |
| SVP | Software Verification Procedure | In English | |
| SVRR | Software Verification Readiness Review | In English | |
| SW | Software | In English | |
| SWCDR | Software Critical Design Review | In English | |
| SWCI | Software Configuration Inspection | In English | |
| SWD&I | Software Development and Integration | In English | |
| SWEE | Software Engineering Environment | In English | |
| SWG | Software Working Group | In English | |
| SWPDR | Software Preliminary Design Review | In English | |
| SWRR | Software Readiness Review | In English | |
| SWS | Software System | In English | |
| SWSF | Semantic Web Science Foundation | In English | → Foundations → Networks, communication → Language, linguistics, literature |
| SWWG | Software Working Group | In English | |
| THAP | Thermal/Hydraulic Analyzer Digital Computer Program | In English | |
| TLCSC | Top-Level Computer Software Component | In English | |
| TMA | Tierce Maintenance Applicative | In French | |
| TOMS | Transactions on Mathematical Software | In English | → Serial publications, periodicals → Mathematics |
| TPMs | Technological Protection Measures | In English | → Artistic property |
| TrAX | Transformation API for XML | In English | → Data |
| TRML | Temporized Reader Markup Language | In English | → Computer-based techniques |
| TROLL | Troupe Redonnaise Orientée Logiciel Libre | In French | → Operating systems |
| TSIS | Traffic Software Integrated System | In English | → Transport and postal services |
| TSP | Trajectory Synthesis Program | In English | → Spaceflight engineering, astronautics |
| TSP | Test Software Program | In English | |
| TSP | Trajectory Shaping Program | In English | → Spaceflight engineering, astronautics |
| TSS | Test Software Support | In English | |
| TSW | Test Software | In English | |
| TTCN | Tree and Tabular Combined Notation | In English | → Programming languages → Networks, communication |
| UAM | User Authentification Module | In English | |
| UFD | User File Directory | In English | |
| UIML | User Interface Markup Language | In English | → Programming languages → Human-computer interaction |
| UPF | Universal Patch Format | In English | |
| USI | Update Software Identity | In English | |
| VDI | Virtual Desktop Infrastructure | In English | |
| VLK | Volume License Key | In English | |
| VM | Virtual Memory | In English | → Memories |
| VML | Vector Markup Language | In English | → Programming languages → Image processing |
| VMS | Virtual Memory System | In English | → Memories |
| VoMM | eVade-o-Matic Module | In English | |
| VTML | Visual Tool Markup Language | In English | → Programming languages → Human-computer interaction |
| VUSW | Vehicle Utility Software | In English | → Vehicle engineering |
| VXML | Voice eXtensible Markup Language | In English | → Programming languages → Data |
| WAC | WebFeat Administrative Console | In English | → Libraries |
| WACT | Web Application Component Toolkit | In French | → Networks, communication |
| WITSA | World Information Technology Software Alliance | In English | → Organizations and associations |
| WMS | Web Management System | In English | → Internet |
| WPF | Windows Presentation Foundation | In English | → Operating systems |
| WPF/E | Windows Presentation Foundation Everywhere | In English | → Operating systems |
| WSCL | Web Services Conversation Language | In English | → Programming languages → Networks, communication |
| WSDL | Web Service Description Language | In English | → Networks, communication |
| WSFL | Web Services Flow Language | In English | → Programming languages → Networks, communication |
| XAML | EXtensible Application Markup Language | In English | → Programming languages → Human-computer interaction |
| XBEL | XML Bookmark Exchange Language | In English | → Programming languages → Networks, communication → Libraries |
| XBL | XML (Extensible Markup Language) Binding Language | In English | → Programming languages → Data |
| XBL | EXtensible Bindings Language | In English | → Programming languages |
| XBRL | EXtensible Business Reporting Language | In English | → Programming languages → Economics |
| XFDL | Extensible Forms Description Language | In English | → Programming languages → Human-computer interaction |
| XFN | XHTML (EXtensible HyperText Markup Language) Friends Network | In English | → Programming languages → Data → Networks, communication" |
| XHTML | EXtensible HyperText Markup Language | In English | → Programming languages → Data |
| XML | EXtensible Markup Language | In English | → Programming languages → Data |
| XNCL | XML Namespace Catalogue Language | In English | → Programming languages → Data |
| XNP | eXtreme Non Programming | In English | |
| XPath | XML Path Language | In English | → Programming languages → Data |
| XPCOM | Cross Platform Component Object Model | In English | → Operating systems |
| XPDL | XML Process Definition Language | In English | → Management → Programming languages |
| XPFE | Cross Platform Front End | In English | → Operating systems |
| XSL | EXtensible Stylesheet Language | In English | → Programming languages → Document processing |
| XSL-FO | XSL (EXtensible Stylesheet Language) Formatting Objects | In English | → Programming languages → Graphical processing |
| XSL-FO | EXtensible Stylesheet Language Formatting Object | In English | → Programming languages → Document processing |
| XSLT | EXtensible Stylesheet Language Transformations | In English | → Programming languages → Document processing |
| XUL | XML-based User interface Language | In English | → Programming languages → Human-computer interaction |
| ΓΣΠ | Γεωγραφικά Συστήματα Πληροφοριών = GIS | Geographic(al) Information System | In English = SIG | Sistema Informativo Geografico | In Italian = SIG | Sistema de Información Geográfica | In Spanish = SIG | Sistema d'informació geogràfica | In Catalan = GIS | Geografický Informační Systém | In Czech = ГИС | Географска информационна система | In Bulgarian = GIS | Geographisches Informationssystem | In German = GIS | Geoinformationssystem | In German = GIS | Geoinfosüsteem | In Estonian = GIS | Geografski informacijski sustav | In Croatian = ממ"ג | מערכת מידע גאוגרפית | In Hebrew = GIS | Geografinė informacinė sistema | In Lithuanian = SIG | Sistem Informasi Geografis | In Indonesian = GIS | Geografisch Informatiesysteem | In Dutch = GIS | Geografiske informasjonssystem | In Nynorsk = GIS | Geografiske informasjonssystemer | In Norwegian = SIG | Sistema de informação geográfica | In Portuguese = ГИС | Географическая Информационная Система | In Russian = GIS | Geografski informacijski sistem | In Slovenian = GIS | Geografiskt InformationsSystem | In Swedish = ГІС | Геоінформаційна система | In Ukrainian |
In Greek | → Geography |
| АБИС | Автоматизированные библиотечные информационные системы = SIGB | Système Intégré de Gestion de Bibliothèque | In French = ILS | Integrated Library System | In English |
In Russian | → Knowledge management → Libraries |
| ГІС | Геоінформаційна система = ΓΣΠ, GIS, SIG, ГИС, ממ"ג (look above) |
In Ukrainian | → Geography |
| ГИС | Географска информационна система = ΓΣΠ, GIS, SIG, ממ"ג, ГІС (look above) |
In Bulgarian | → Geography |
| ГИС | Географическая Информационная Система = ΓΣΠ, GIS, SIG, ממ"ג, ГІС (look above) |
In Russian | → Geography |
| ממ"ג | מערכת מידע גאוגרפית = ΓΣΠ, GIS, SIG, ГИС, ממ"ג, ГІС (look above) |
In Hebrew | → Geography |