| Abk. | Bedeutung | Kontext |
| S | Nachname | X.400-Adressierung |
| S | Soll | BWL |
| S | Schweden | Autokennzeichen |
| S | Sparen | VWL |
| s. | siehe | |
| S. | Seite | |
| S/MIME | Secure/Multipurpose Mail Extension | |
| SA | Systemaufsicht | MS Exchange Server |
| SachBezV | Sachbezugsverordnung | |
| SADT | Structured Analysis and Design Technique | |
| SAG | SQL Access Group | |
| SAM | Security Account Manager | Microsoft |
| SAP | Sercice Access Point | |
| SAP | Service Advertising Protocol | Novell Netware |
| SAP | Systemanalyse und Programmentwicklung | |
| SATT | Software Analysis Test Tool | IBM |
| Sb | Antimon | Chemisches Element |
| SBK | Schlußbilanzkonto | |
| SCCS | Source Code Control System | |
| SCSI | Small Computer Systems Interface | |
| SCU | SIMAP Central Unit | |
| SD | Structured Design | |
| SDC | Sicherungsdomänen-Controller | MS Windows NT |
| SDI | Single Document Interface | |
| SDLC | Synchronous Data Link Control | |
| SDW | Segment Descriptor Word | |
| Se | Selen | Chemisches Element, Halbleiter |
| SE | Sichteinlagen | Finanzmarkt |
| SED | Stream Editor | |
| SEDAS | Standardregelungen Einheitlicher Datenaustauschsysteme | |
| SEMPER | Secure Electronic Marketplace for Europe | |
| SEP | Strategische Erfolgsposition | |
| SERM | Strukturiertes Entity-Relationship-Modell | |
| SETCOM | Semantisch reicher Thesaurus für kooperatives Modellieren | Informatik |
| SET | Secure Electronic Transaction | |
| SET | Standard d'Exchange et de Transfert | |
| SF | Science Fiction | |
| SFD | Simple Formatable Document | X.400 |
| SFM | Services für Macintosh | Microsoft |
| SGB | Sozialgesetzbuch | |
| SGE | Strategische Geschäftseinheit | |
| SGF | Strategisches Geschäftsfeld | |
| SGI | Silicon Graphics | |
| SGML | Standard Generalized Markup Language | |
| Si | Silizium | Chemisches Element |
| SID | Sicherheits-ID | |
| SigG | Signaturgesetz | |
| SIGMOD | Special Interest Group on Managment of Data | ACM |
| SIL | Single-In-Line | Montagerahmen für Chip |
| SIM | Subscriber Identity Module | Mobilfunk |
| SIMAP | Système d'Information pour les Marchés Publics | |
| SIMD | Single Instruction Multiple Data | |
| SIMO | Semantisches Informationsmodell | |
| SISD | Single Instruction Single Data | |
| SIV | Soll-Ist-Vergleich | BWL |
| SK | Selbstkosten | BWL |
| SL | Sonderlager | BWL |
| SL | Stückliste | |
| SLED | Solution Light-Emitting Device | |
| SLIP | Serial Line Internet Protocol | Netzwerke |
| SLK | Stücklistenkette | |
| SMAU | Smart Multistation Access Unit | |
| SMB | Server Message Block | |
| SMD | Stroage Module Drive | |
| SMDS | Switched Multimegabit Data Services | |
| SMIL | Synchronized Multimedia Integration Language | XML |
| SMP | Symmetric Multiprocessor | |
| SMS | System Management Server | Microsoft |
| SMTP | Simple Mail Transfer Protocol | |
| SNA | System Network Architecture | IBM |
| SNADS | System Network Architecture Distributed Systems | |
| SNMP | Simple Network Management Protocol | |
| SNNS | Stuttgarter Neuronale Netze System | |
| soE | Sonstige Einkünfte | Steuerrecht |
| sog. | sogenannt | |
| SOHO | Small Offices and Home Offices | |
| SONET | Synchronous Optical Network | |
| SOS | Silicon on Sapphire | |
| SOS | Save our souls | |
| SP | Service Pack | Software |
| SP | Strategische Planung | Zeitschrift |
| Sp. | Spalte | |
| SPARC | Systems Planning and Requirements Committee | ANSI |
| SparPG | Sparprämiengesetz | |
| SPC | Statistical Process Control | |
| SPD | Sozialdemokratische Partei Deutschlands | |
| SPI | Strategie Planning Institute Boston/London | BWL |
| SPICE | Simulation Program with Integrated Circuit Emphasis | |
| SPS | Speicherprogrammierbare Steuerung | |
| SPX | Sequenced Packet Exchange | |
| SQL | Structure Query Language, Standard Query Language | |
| SRAM | Static Random Access Memory | |
| SRS | Software Requirements Specification | |
| SSAP | Session Service Access Point | OSI-Schichtenmodell |
| SSI | Small Scale Integration | Elektrotechnik |
| SSI | Server Side Includes | Internet |
| SSL | Secure Sockets Layer | |
| S/STP | Screened Shielded Twisted Pair | Netzwerkkabel |
| STA | Spanning Tree Algorithm | |
| StB | Steuerbilanz | BWL |
| StbJb | Steuerberater-Jahrbuch | |
| STEP | Standard for the Exchange of Product Model Data | |
| SteuerStud | Steuer und Studium | Zeitschrift |
| STF | Setup Table File | |
| StGB | Strafgesetzbuch | |
| STP | Shielded Twisted Pair | Netzwerkkabel |
| StPO | Strafprozeßordnung | |
| STS | Synchronous Transport Signals | |
| STTL | Schottky TTL | |
| StuW | Steuer und Wirtschaft | Zeitschrift |
| StWG | Stabilitäts- und Wachstumsgesetz | |
| SuSE | Software- und Systementwicklung | |
| S/UTP | Screened Unshielded Twisted Pair | Netzwerkkabel |
| SVC | Switched Virtual Circuits | |
| SVR | Sachverständigenrat | |
| SW | Software | |
| SWIFT | Society for World-wide Interbank Financial Telecommunication | |
| SWR | Südwest Rundfunk | |