This is a big story.
WebSphere is the "flagship" "application server" [L1 ] from COMPANY: IBM. What that means in the year 2001 is a Web server, with a method for active content, plus convenience functions for database access, and at least lip service to load-leveling, security, and so on.
Because it's IBM, WebSphere uses Java for as much as possible, and prefixes all descriptions with "e-commerce". The technical basis is
As one too-wise correspondent justly noted, "You need to be a DBA, Apache Administrator and a JAVA guru to do a clean install."