[1] In the UK and Ireland, there are four products under the Sage 50 banner: Accounts, Payroll, HR and P11D.

[5] In the late 1990s, Sage Instant – a cut-down version of the product line – was introduced.

The company was carved out of The Computersystem Center, an early Altair dealer founded by Roberts, Mann, Jim Dunion, and Rich Stafford, which Dyer had joined as the manager and where its first software was published in 1977.

Peachtree was the first successful business software made for microcomputers, supplanting the General Ledger programmed with CBASIC and distributed by Structured Systems Group.

The company expanded its offerings with its acquisition of Layered, an accounting program designed for use on the Macintosh.

The company's products were included in the initial launch of the IBM Personal Computer, and it was acquired by Management Science America (MSA) in June 1981.

By early 1984 InfoWorld estimated that Peachtree was the world's seventh-largest microcomputer-software company, with $21.7 million in 1983 sales.

[12] After several subsequent changes of ownership ending with ADP, Inc., Peachtree was eventually acquired by the Sage Group in 1998 for US$145 million.

Simply Accounting became an Independent Business Unit of Computer Associates in 1996 and subsequently incorporated as ACCPAC International, Inc. in 1998.

It is widely used in industry, with job advertisements frequently requiring proficiency in the software, and training courses are available by third-party providers.