 | J2C |
| J2EE |
| J2ME |
| Jack in the Box |
| Java |
| JavaBean |
| Java Database Connectivity (JDBC) |
| JavaMail |
| Java Messaging Service (JMS) |
| Java Naming Directory Interface (JNDI) |
| Java Online Analytical Processing (JOLAP) |
| Javascript |
| Java Server Page (JSP) |
| Java Virtual Machine (JVM) |
| JAX RPC |
| Jidohka / Jidoka |
| Jiffy Bag |
| Jishuken |
| Job Control Language (JCL) |
| Job Function |
| Job Instruction |
| Job Number |
| Job titles |
| Jog |
| Jogger |
| Join / Joins |
| Joint Application Development (JAD) Session |
| Jointly Addressed Mail |
| Joint Photographic Experts Group (JPG / JPEG) |
| Joint Supervisory Authorities |
| Journal File |
| JSR 168 |
| Judgemental quality criteria |
| Judgment Inspection |
| Julian Dating |
| Junk E-Mail Reporting |
| Junk Mail |
| Juran Trilogy |
| Just-in-Time (JIT) |
| Just-in-Time (JIT) Compiler |
| Just-in-Time (JIT) Manufacturing |
| Just-in-Time (JIT) Process |
| Just-in-Time (JIT) Training |
| Just-in-time information |
| Jx |
