Unisys Corp’s Computer Systems Group (CSG) has acquired Pioneer Systems Inc, a developer of database access and interoperability software. Unisys has been licensing Pioneer software for its mainframe-class enterprise server line since 1995. Under the agreement Pioneer will become part of the CSG’s Enterprise NT Business Initiative, which will develop and package middleware to provide enterprise capabilities for Unisys systems based on Windows NT. It will also provide middleware for ensuring that Unisys NT systems will interoperate with legacy systems, Unix systems and NT systems from other vendors. Financial terms of the acquisition were not disclosed.