JAR File - Java Archive Files (It contains all the JAVA Classes for the specific module)
WAR File - Web Application Archive (Contains all the JARs, JSP (JavaServer Page), Java Servlets, JAVA Classes , XML files, tag libraries and static Web pages (HTML and related files) that together constitute a Web application.
EAR - EAR (Enterprise Archive) is a file format used by Java EE for packaging one or more modules into a single archive so that the deployment of the various modules onto an application server happens simultaneously and coherently. It also contains XML files called deployment descriptors which describe how to deploy the modules.
Ant or Maven can be used to build EAR files.
LDAP - Lightweight Directory Access Protocol
SLF4J - Simple Logging Facade for Java (Wrapper implementation of log4j, LoggingAdapter, A Very simple logging...) Its a LoggingFactory
To know the version of the API / JAR see META-INF/MANIFEST.MF
JAX-WS - Java API for XML Web Service
JPA - Java Persistence API
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