Simplified Guide to the Java 2 Platform, Enterprise Edition

Enterprises today need to extend their reach, reduce their costs, and lower their response times by providing easy-to-access services to their customers, partners, employees, and suppliers. Typically, applications that provide these services must combine existing enterprise information systems (EIS) with new business functions that deliver services to a broad range of users. [via]

http://java.sun.com/j2ee/reference/whitepaper...