EIS is an acronym for enterprise information system.
An enterprise information system is the set of applications that
comprise an enterprise's system for handling company-wide
information. These applications provide an information infrastructure
for an enterprise. An enterprise information system offers a
well-defined set of services to its clients. These services are
exposed to clients as local or remote interfaces.
Examples of enterprise information systems include:
enterprise resource planning systems,
mainframe transaction processing systems,
and legacy database systems.
J2EETM Connector Architecture.