Peachtree Software was a software publisher founded in 1975 with the first software published in 1976. They are most notable for a series of well-regarded accounting packages collectively referred to as Peachtree Accounting . Peachtree was acquired by the Sage Group in 2002 for US$145 million. Peachtree Software was the first business software introduced for microcomputers and the oldest microcomputer software program for business in current use, with the possible exception of the original Microsoft Basic interpreters also introduced in 1975.