| Abk. | Bedeutung | Kontext |
| B-ISDN | Breitband-ISDN | |
| B | Basis | Transistor |
| B | Belgien | Autokennzeichen |
| B | Bor | Chemisches Element |
| B/F | Background/Foreground | |
| BöMaPr | Börsen- oder Marktpreis | BWL |
| BÜVO | Beitragsüberwachungsverordnung | |
| Ba | Barium | Chemisches Element |
| Ba | Baschaffung aktuell | Zeitschrift |
| BA | Berufsakademie | |
| BAB | Betriebsabrechnungsbogen | BWL |
| BAC | Balanced Asynchronous Class | |
| BAD | Broken As Designed | |
| BAG | Bundesarbeitsgericht | |
| BAK | Binary Adaption Kit | Microsoft |
| BAL | Basic Assembly Language | |
| BAM | Boyan Action Module | |
| BAnz. | Bundesanzeiger | |
| BAPT | Bundesamt Post und Telekommunikation, Mainz | |
| BARRnet | Bay Area Regional Research Network | |
| BARTS | Bell Atlantic Regional Timesharing | |
| BAS | Bild-Austast-Synchron | -Signal |
| BASIC | Beginner's All-Purpose Symbolic Instruction Code | |
| BASM | Built-In Assembler | |
| BATC | Block Address Translation Cache | |
| BauGB | Baugesetzbuch | |
| BayObLG | Bayerisches Oberstes Landesgericht | |
| BAZ | Bearbeitungszelle | BWL |
| BB | beschränkt balanciert | Baum |
| BB | Betriebs-Berater | Zeitschrift |
| bB | bezahlt Brief | Finanzmarkt |
| BBC | British Broadcasting Corporation | |
| BBergG | Bundesberggesetz | |
| BBN | Bolt, Beranek and Newman, Cambridge, Mass. | Internet |
| BBS | Bulletin Board System | |
| BC | Begin Chain | |
| BCC | Blind Carbon Copy | |
| BCC | Block Check Character | |
| BCD | Binär codierte Dezimalzahl, binary coded decimals | |
| BCE | Bell Canada Enterprises | |
| BCH | Bose-Chaudhuri-Hocquenghem | -Code |
| BCL | Batch Command Language | |
| BCNF | Boyce/Codd noram form | Datenbanken |
| BCP | Byte Control Protocol | |
| BCP | Bulk Copy Program | |
| BCPL | Basic Computer/Combined Programming Language | |
| BCR | Byte Count Register | |
| BCS | Binary Synchronous Communications | |
| BCS | Boeing Computer Services, | |
| Bd. | Band | |
| BDA | Bundesvereinigung der Deutschen Arbeitgeberberbände | |
| BdB | Bundesverband deutscher Banken | |
| BDC | Backup Domain Controller | MS Windows NT |
| BDE | Betriebsdatenerfassung | |
| BdF | Bundesministerium der Finanzen | |
| BDI | Bundesverband der deutschen Industrie | |
| BDLC | Burroughs Data Link Control | |
| BDOS | Basic Disk Operating System | |
| BDSG | Bundesdatenschutzgesetz | |
| BDW | Block Descriptor Word | |
| Be | Beryllium | |
| BECN | Backward Explicit Congestion Notification | |
| BEL | Bell | ASCII-Zeichen Nr. 7 |
| BELLCORE | Bell Communications Research, Inc. | |
| BEM | Boundary Element Method | |
| BEP | Break Even Point | |
| BER | Basic Encoding Rules | |
| BER | Bit Error Rate, Basic Encoding Rules | |
| Berkom | Berliner Kommunikationssystem | |
| BerlFG | Berlin-Förderungsgesetz | |
| BERT | Bit Error Rate Test/Tester | |
| BETC | Between Chain | |
| BetrVG | Betriebsverfassungsgesetz | |
| BewG | Bewertungsgesetz | |
| BF | Bad Flag, Boundary Function | |
| BFBI | Brute Force and Bloody Ignorance | Slang |
| BfD | Bundesbeauftragter für Datenschutz | |
| BFH | Bundesfinanzhof | |
| BFI | Brute Force and Ignorance | Slang |
| BFM | Bundesfinanzministerium | |
| BFMI | Brute Force and Massive Ignorance | Slang |
| BFS | Breadth First Search | |
| BFT | Binary File Transfer | |
| BFTP | Batch/Background File Transfer Protocol | |
| BFuP | Betriebswirtschafliche Forschung und Praxis | Zeitschrift |
| bG | bezahlt Geld | Finanzmarkt |
| BGA | Ball Grid Array | |
| BGB | Bürgerliches Gesetzbuch | |
| BGBl. | Bundesgesetzblatt | |
| BGH | Bundesgerichtshof | |
| BGHZ | Entscheidungen des Bundesgerichtshofes in Zivilsachen | |
| BGI | Borland's Graphics Interface | |
| BGP | Border Gateway Protocol | Internet |
| BHO | Bundeshaushaltsordnung | |
| BHP | Bayerische Hacker-Post | |
| BI | Binary Input | |
| Bi | Bismut | Chemisches Element |
| BIGFON | Breitbandiges Integriertes Glasfaser-Fernmelde-Ortsnetz | |
| BIM | Begin of Information Marker | |
| BiMOS | Bipolar Metal Oxide Semiconductor | |
| BIND | Berkeley Internet Name Domain Server | |
| BIOS | Basic Input Output System | |
| BIP | Bruttoinlandsprodukt | VWL |
| BiRiLiG | Bilanzrichtlinien-Gesetz | |
| BIS | Business Information System | |
| BISYNC | Binary Synchronous Communication Protocol | IBM |
| BIT | Business Information Technology | |
| BITNET | Because It's Time Network | ein NJE-Netz |
| BIU | Basic Information Unit | |
| BIU | Bus Interface Unit | |
| BIX | Byte Information Exchange | ein BBS |
| BIZ | Bank für Internationalen Zahlungausgleich | |
| BK | Bürokommunikation | |
| Bk | Berkelium | Chemisches Element |
| BKA | Bundeskriminalamt | |
| BKS | Bundesverband Kabel + Satellit | |
| BKZ | Bereichskennzahl | Datex, Btx |
| BL | Backlit | |
| BLAST | Blocked Asynchronous Transmission | Protocol |
| BLER | Block Error Rate | |
| BLERT | Block Error Rate Test | |
| BLK | Block | |
| BLM | Bayerische Landeszentrale für Neue Medien, München | |
| BLMC | Buried Logic Macrocell | |
| BLOB | Binary Large Object | |
| BM | Bitonic Merge | Graph, Netz |
| BMC | Block Multiplex Channel | |
| BMFT | Bundesministerium für Forschung und Technik | |
| BMIC | Bus Master Interface Controller | Intel |
| BMP | Batch Message Processing Program | |
| BMPT | Bundesministerium für Post- und Telekommunikation | |
| BMS | Broadcast Message Server | |
| BMUG | Berkeley MacIntosh Users Group | |
| BMW | Bayerische Motorenwerke | |
| BMWF | Bundesministerium für Wirschaft und Finanzen | |
| Bn | Börsenplatz Berlin | Finanzmarkt |
| BNC | British Naval Connector | Ethernet |
| BNC | Bayonet Neill Concelman | Steckersystem |
| BNF | Bachus-Naur-Form | |
| BNPF | Begin Negative Positive Finish | |
| BO | Binary Output | |
| BOART | Bus Oriented Asynchronous Receiver Transmitter | |
| BOB | Bayerische Oberlandbahn | |
| BOC | Bell Operating Company | |
| BOD | Books On Demand | Unternehmen |
| BODTF | Business Object Domain Task Force | |
| BOF | Board of Fellows, Birds Of a Feather | Slang |
| BOFS | Birds of a Feather Session | |
| BOL | Bertelsmann Online | Unternehmen |
| BOM | Begin Of Message | |
| BOMP | Bill of Material Processor | |
| BOOTP | Bootstrap Protokoll | Internet |
| BOP | Bit Oriented Protocol | |
| BOS | Basic Operating System | |
| BOT | Begin Of Tape/Table | |
| BP | Base Pointer | |
| BP | British Petroleum | |
| BPatG | Bundespatentgericht | |
| BPB | BIOS Parameter Block | |
| BPI | Bits per Inch | |
| BPM | Bundespostministerium | |
| BPO | Betriebsprüfungsordnung | |
| BPS | Bits pro Sekunde | |
| BPU | Branch Prediction Unit | |
| BPW | Bruttoproduktionswert | VWL |
| BQS | Berkeley Quality Software | |
| BR | Bad Register | |
| Br | Brom | Chemisches Element |
| BR | Bundesrat | |
| BRAM | Broadcast Recognizing Access Method | |
| BRD | Bundesrepublik Deutschland | |
| BRE | Basic Regular Expression | |
| BREP | Boundary Representation | |
| BRG | Bilanzrichtlinien-Gesetz | |
| BRI | Basic Rate Interface | |
| BRI | Brain Response Interface | |
| BRIM | Bridge Router Interface Module | |
| BRT | Bruttoregistertonne | |
| BS | Backspace | |
| BS | Base Station | |
| BS | Betriebssystem | |
| BS | Bitonic Sort | Graph |
| BSA | Business Software Alliance | |
| BSAM | Basic Sequential Access Method | |
| BSC | Binary Synchronous Communication | IBM |
| BSD | Berkeley Software/System Distribution | |
| BSDL | Boundary Scan Description Language | |
| BSE | Bovine Spongiform Encephalopathy, Rinderwahn | |
| BSF | Bit Scan Forward | |
| BSI | Britisch Standards Institute | |
| BSI | Bundesamt für Sicherheit | |
| BSM | Bracket State Manager | |
| BSMTP | Batch Simple Message Transfer Protocol | |
| BSP | Byte Stream Protocol | |
| BSP | Bruttosozialprodukt, Bruttoinländerprodukt | VWL |
| Bsp. | Beispiel | |
| bspw. | beispielsweise | |
| BSR | Bit Scan Reverse | |
| BStBl. | Bundessteuerblatt | |
| BSV | Bundesschuldenverwaltung | |
| BSY | Busy | |
| BSYNC | Binary Synchronous Communications | Protocol |
| BT | Bit Test, British Telecommunications | |
| BT | Bundestag | |
| BTAM | Basic Telecommunication Access Method | IBM |
| BTB | Branch Target Buffer | |
| BTC | Bit Test and Complement | |
| BTI | Britisch Telecom International | |
| BTLB | Block TLB | |
| BTMA | Busy Tone Multiple Access | |
| BTO | Built To Order | |
| BTP | Batch Transfer Program | |
| BTR | Bit Test and Reset | |
| BTS | Bit Test and Set | |
| BTU | Basic Transmission Unit | |
| BTW | By The Way | Slang |
| Btx | Bildschirmtext | |
| BUAF | Big Ugly ASCII Font | |
| BUAG | Big Ugly ASCII Graphic | |
| BUF | Buffer | |
| BUrlG | Bundesurlaubsgesetz | |
| BUUG | Belgian UNIX Users Group | |
| BVerfG | Bundesverfassungsgericht | |
| BVerfGE | Entscheidungen des Bundesverfassungsgerichts | Amtliche Sammlung |
| BVG | Bundesverfassungsgericht | |
| BWL | Betriebswirtschaftslehre | |
| BWM | Block Write Mode | |
| BWQ | Buzz Word Quotient | |
| BWSN | Baden-Württembergisches Schulnetz | |
| BZT | Bundesamt für Zulassungen in der Telekommunikation | |
| bzw. | beziehungsweise | |