J2SE (Java 2 SDK Enterprise Edition) APIs

JDBC (Java Database Connectivity )

Servlet

JSP (Java Server Page )

JNDI (Java Naming and Directory Interface )

RMI (Remote Method Invocation )

CORBA (Common Object Request Broker Architecture )

EJB (Enterprise JavaBean)

JMS (Java Message Service )

Transactions

J2EE Connector

XML (eXtensible Markup Language )

(References: Sun's JavaTM Platform Enterprise Edition )