etc.). The first version of PLUS (which stood for Program Library Update System) required the use of magnetic tape devices, and was not competitive with the other, disk-based products. Although the company eventually responded with a disk-based version, called PLUS-DA (which stood for Direct Access, a common name for disks at the time) they did not become successful in this market.

The first breakthrough product was a report writer named Culprit, developed in-house by Gil Curtis