| JPEG |
Joint Photographic Experts Group |
| JPL |
Jet Propulsion Laboratory, Pasadena, USA |
| JPL |
Java Perl Lingo |
| JPL |
Jyacc Procedural Language |
| JRE |
Java Runtime Environment |
| JSDK |
Java Servlet Development Kit |
| JSF |
Jabber Software Foundation |
| JSM |
Job Stream Manager |
| JSP |
Java Server Page/Pages |
| JSQL |
Java SQL |
| JSS |
Javascript Style Sheet |
| JSSE |
Java Secure Socket Extension |
| JT |
Job Table |
| JTAG |
Joint Test Action Group |
| JTAM |
Job and Transfer Manipulation |
| JTAP |
JTC1 TAG Application Portability Study Group |
| JTAPI |
Java Telephony Application Programming Interface |
| JTC |
Joint Technical Committee (ISO/IEC) |
| JTM |
Job Transfer and Management/Manipulation |
| JTS |
Java Transaction Service |
| JUD |
Jabber User Directory |
| JUG |
Java User Group |
| JUGD |
Java User Group Deutschland |
| JUGFET |
Junction Gate Field Effect Transistor |
| JUMP |
Java User Migration Path |
| JUNET |
Japan/Japanese UNIX Network |
| JUST |
Joint Users of Siemens Telecommunications |
| JV |
Job Variable |
| JVM |
Java Virtual Machine |
| JVNC |
John-von-Neumann (Super-Computer-) Center |
| JVT |
Joint Video Team |
| JWS |
Java Workshop |
| JXTA |
Juxtapose (Sun) |
| K |
Key, Kilo, Kommunikation |
| K+R |
Kernighan + Ritchie |
| K12 |
Kindergarten through 12th grade, K-12 |
| KAD |
Kontoauszugsdrucker |
| KALUG |
Karlsruhe Linux User Group |
| KB |
Kilobyte |
| KB |
Knowledge Base |
| KB |
Keyboard |
| KBPS |
Kilobit/byte per second |
| KBS |
Knowledge Based System |
| KC |
Kids Computer |
| KCC |
Keyboard Communications Concentrator |
| KCD |
Kernel Cousin Debian |
| KCL |
Kyoto Common Lisp |
| KCS |
Kansas City Standard |
| KD |
Knowledge Discovery |
| KDC |
Key Distribution Center |