Abstract In contemporary business the building of new systems upon existent and proven structures has become a major key to success for a company. The information technology experiences constantly growing challenges. Thus, it is difficult to develop software that provides a rock solid basis for today's business applications. The idea of Sun Microsystems was that developers implement portable components, the Enterprise JavaBeans, running on a mighty framework which provides the most important functions for enterprise applications. The developer is able to focus on the business functions rather than the system services. This supports and shortens the whole process and reduces the risk of mistakes in design. The Enterprise JavaBeans specifation has to react to the constantly emerging demands of the industry. This document introduces the recently released version 2.1 and provides a background to the Enterprise JavaBeans architecture and concepts.
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