from this master server whenever they changed. V5 also included a miniature version of MQ 5.3 called the embedded Java Message Service (JMS) server. Express Edition replaces the Standard Edition. Express now becomes the term to indicate SME-oriented offerings from IBM, across all its software brands. Base Network Deployment. This version supports deployment of a cell configuration with cluster and J2EE failover support. It now also includes Edge Components, previously known as Edge Server. This provides a proxy server, load balancing, and content-based routing. Enterprise Edition. This version added a workflow engine, called the Process Choreographer, for the first time but predates the BPEL standard. It also added the first fully supported application threading model called WebSphere Asynchronous Beans. WebSphere Application Server for z/OS. This version is essentially the same as the Network Deployment product but is optimized to take full advantage of z/OS features, such as Workload Manager, to leverage the key technologies that make the mainframe indispensable for mission-critical, scalable, and secure workloads. Version 4.0 This was a J2EE 1.2 certified application server. It inherited the database-based configuration model from V3.x for all but the single-server edition, which already used an XML datastore. AE (Advanced Edition) AEs (Advanced Edition single). Single-server edition that was not able to run in a cluster configuration. AEd (Developer Edition). Functionally equivalent to AEs, but intended only for non-production development use. EE (Enterprise Edition) Version 3.5 (and 3.0) WebSphere 3.5 is the first widely used version of WebSphere. Version 2.0 IBM adds JavaBean, CORBA and Linux support. Comes in two editions: Standard Edition (SE) and Advanced Edition (AE). Version 1.0 Initial release in June 1998. Was primarily a Java Servlet engine. Security The WebSphere Application Server security model is based on the services provided in the operating system and the Java EE security model. WebSphere Application Server provides implementations of user authentication and authorization mechanisms providing support for various user registries: Local operating system user registry LDAP user registry Federated user registry (as of version 6.1) Custom user registry The authentication mechanisms supported by WebSphere are: Lightweight Third Party Authentication (LTPA) See also Java (software platform) IBM Rational Business Developer Other Java EE application servers: List of application servers Tomcat GlassFish JBoss AS Payara Server SAP NetWeaver Application Server WebLogic Server References External links IBM WebSphere main page Web frameworks Java enterprise platform Application Server Web server software Web server software programmed in