The Free On-line Dictionary of Computing (30 December 2018):

Enterprise JavaBeans
EJB

    (EJB) A server-side
   component architecture for writing reusable business logic
   and portable enterprise applications.  EJB is the basis of
   Sun's Java 2 Platform, Enterprise Edition (J2EE).

   Enterprise JavaBean components are written entirely in Java
   and run on any EJB compliant server.  They are operating
   system, platform, and middleware independent, preventing
   vendor lock-in.

   EJB servers provide system-level services (the "plumbing")
   such as transactions, security, threading, and
   persistence.

   The EJB architecture is inherently transactional,
   distributed, multi-tier, scalable, secure, and wire
   protocol neutral - any protocol can be used: IIOP,
   JRMP, HTTP, DCOM etc.  EJB 1.1 requires RMI for
   communication with components.  EJB 2.0 is expected to require
   support for RMI/IIOP.

   EJB applications can serve assorted clients: browsers, Java,
   ActiveX, CORBA etc.  EJB can be used to wrap legacy
   systems.

   EJB 1.1 was released in December 1999.  EJB 2.0 is in
   development.

   Sun claims broad industry adoption.  30 vendors are shipping
   server products implementing EJB.  Supporting vendors include
   IBM, Fujitsu, Sybase, Borland, Oracle, and
   Symantec.

   An alternative is Microsoft's MTS (Microsoft Transaction
   Server).

   (http://java.sun.com/products/ejb/).

   FAQ (http://java.sun.com/products/ejb/faq.html).

   (2000-04-20)