[4] Sage 300 is a Windows based range of ERP software, running on Microsoft SQL.

The original product, EasyBusiness Systems, was developed for the CP/M operating system[8] in 1976 by Don Thomson, Ted Comfoltey, Keith Wales, and Norm Francis of Basic Software Group[9] and distributed by Information Unlimited Software.

[9][10] Computer Associates acquired Information Unlimited Software in 1983[11][12][13] and ran it as an independent business unit.

[14][15] Easy Business Systems added payroll processing in 1984 and supported multiuser networking at this time.

[23] In August 2001, the company presented ACCPAC Advantage Series 5.0, its first web-based version.