J
- J-lead
- J2EE
- J2ME
- jabber
- JAD
- jagged image
- JAIC
- jailbreak
- JARA
- JAUS
- Java
- Java Card
- Java letters
- Java SE
- JavaCPU
- JavaScript
- JAXA
- JCA
- JCP
- JDK
- JEDEC
- JIEDDO
- Jini
- JIT
- JIT compiler
- jitter
- jitter buffer
- JK flip-flop
- JLS
- JMS
- JMX
- job assignment
- job queue
- job scheduler
- job shadowing
- jogging
- joint
- joint motion
- joint space
- joule
- journaling file system
- Jovial
- joystick
- JPEG
- JPEG XR
- JRuby
- JSON
- JTAG
- JTAG chain
- JTAG interface
