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VSSI Overview.

VSSI was formed in 1978 to develop extensions to VM/370 that would support the IBM Transaction Processing Facility (TPF). The first product developed, Virtual PARS (VPARS), is a shadow database facility that allows multiple VM guests to run TPF from a common base system. Over 90% of IBM's licensed TPF customers use VPARS to support their development.

In 1984-85, after numerous requests from many VPARS users, VSSI developed a Virtual Tape (VTAPE) simulation product. Originally created to support TPF usage of tape drives, Virtual TAPE is now widely used by both TPF and non-TPF sites to provide Virtual tape support for VM guests.

Virtual Software Systems, Inc. is located in Georgia, near Atlanta, and can be reached at:

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