2. J/Direct (Java/Direct)
3. J2EE (Java 2 Platform, Enterprise Edition)
4. J2ME (Java 2 Platform, Micro Edition)
5. J2SE (Java 2 Standard Edition)
6. Jabber
7. jack plug
8. Jaguar
9. JAR file (Java ARchive file)
10. Java
11. Java 2
12. Java servlet
13. JavaBeans
14. JavaOS
15. JavaScript
16. Jaz drive
17. JCL (Job Control Language)
18. JDBC (Java Database Connectivity)
19. JDC (Japanese Digital Cellular)
20. JDK (Java Development Kit)
21. JEP (Joint Electronic Payment Initiative)
22. JET (Joint Engine Technology)
23. jet printer
24. JFC (Java Foundation Classes)
25. JIC (Just in case)
26. Jigsaw
27. Jini
28. JIT (Just-In-Time compiler)
29. jitter (1)
30. jitter (2)
31. JK (Just kidding)
32. JMAPI (Java Management API)
33. JMS (Java Message Service)
34. job
35. job ticket
36. jog wheel
37. join
38. Joomla!
39. journal
40. journaling
41. journaling file system
42. journaling file system
43. Jove
44. joypad
45. joystick
46. JPEG (Joint Photographic Experts Group)
47. JPG
48. JRE (Java Runtime Environment)
49. JScript
50. JSP (1) (JavaServer Pages)
51. JSP (2) (Jackson Structured Programming)
52. JTAC (Japanese Total Access Communication)
53. JTAG (Joint Test Action Group)
54. JTAPI (Java Telephony API)
55. Jughead
56. jukebox
57. jump
58. jump instruction
59. junk e-mail, junk mail
60. justification
61. justify
62. JVM (Java Virtual Machine)
63. JXTA (Juxtapose)