There's an amusing paradox between the connotation and literal meaning of enterprise software. The term literally refers to software that is written for internal use by a company, as opposed to software that is written as a commercial product (or website). However, the connotation these days is that it has an extra level of quality. In practice, most of the software that companies write for internal use is the worst kind of quick and dirty junk. It's the land of Visual Basic and PowerBuilder. A far cry from the image that J2EE is trying to foster.
in reply to What is Enterprise Software?