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J2EE
Stands for Java 2 Platform, Enterprise Edition. 1.4 is the current version as of Mar 2004.

JMS
Stands for Java Message Service. Part of J2EE, JMS defines a vendor-neutral (but java-specific) set of programming interfaces for interacting with asynchronous messaging systems.

Kdb
 A high-performance relational database platform for 32-bit architectures from Kx Systems, Inc.

L