J2CE - Java 2 Cryptographic Edition 
J2EE - Java 2 Enterprise Edition 
J2ME - Java 2 Micro Edition 
J2SE - Java 2 Standard Edition 
JAAS - Java Authentication and Authori… 
JACM - Journal of the Association for… 
JAD - Joint Application Development 
JADE - Jasmine Application Development… 
JAE - Java Application Environment 
JAI - Java Advanced Imaging 
JAIN - Java API for Integrated Network… 
JAMC - Journal of Applied Mathematics… 
JANET - Joint Academic Network 
JAOO - Java and Object Orientation 
JAP - Java Anon Proxy 
JAPH - Just Another PERL Hacker 
JAR - Java Archive 
JARS - Java Applet Rating Service 
JAS - Java Application Server 
JASIS - Journal of the American Societ… 
JASS - Javascript-Accessable Style She… 
JASS - Jumpstart Architecture and Secu… 
JavaOS - Java operating system 
JAX - Java API for XML 
JAX - Java, Apache, XML 
JAX-R - Java API for XML Registries 
JAX-RPC - Java XML for Remote Procedur… 
JAXB - Java API for XML Binding 
JAXB - Java Architecture for XML Bindi… 
JAXM - Java API for XML Messaging