"Decimal Concepts" is a 1988 educational program developed by Sheila Dols, Susan M. Gabrys, Shari Glenn, Scott Jensen, John Persoon, Jane Peterson, Craig Solomonson, and James L. Thompson, and distributed by MECC. This is version 1.0. It requires an Apple IIgs, Apple //c+, or 128K Apple //e with a compatible drive controller card.