MAI Basic Four
MAI Basic Four (sometimes written as Basic/Four Corporation or Basic 4) refers to a variety of Business Basic, the computers that ran it, and the company that sold them (its name at various times given as MAI Basic Four Inc., MAI Basic Four Information Systems, and MAI Systems Corporation). MAI Systems Corporation became a wholly owned subsidiary of Softbrands Inc. in 2006.
Basic/Four Corporation was created as a subsidiary of Management Assistance, Inc. in Irvine, California. Basic/Four sold small business minicomputers that were assembled from Microdata Corporation CPUs.
MAI Basic Four Business Basic was one of the first commercially available business BASIC interpreters. MAI Basic Four (the company) originally sold minicomputers but later offered superminicomputers and microcomputers. The computers ran an operating system with the BASIC interpreter integrated.
The company released accounting software for third-party microcomputers in the mid 1980s. In 1988 it released its own 80286-based workstation.  The Basic4 system was utilized by many small banks and credit unions.
In 1990 the company changed its name to MAI Systems Corp. and changed its business to be a system integrator instead of a combined hardware and software manufacturer, reselling third-party computers but installing their own customer-specific software system. 
- Kathleen Burton, LeBow vows steady course after MAI housecleaning, Computerworld 18 March 1985 page 82
- Associated Press (November 24, 1988). "COMPANY NEWS; MAI Basic Pursues Prime Computer". New York Times. Retrieved April 12, 2011.
- Julie Webber, MAI Introduces 286 Family of Workstations, Info Word, 8 August 1988 page 28
- https://articles.latimes.com/keyword/mai-basic-four-inc Stories about MAI, retrieved June 9,2017