Sage MAS 90 is accounting software offered by Sage Software. First offered in the early 1980s, it gained significant market share by using Certified Public Accountants (CPA's) as the initial resellers. As many CPAs became comfortable with the software, they increasingly recommended it to their clients who were looking for something more powerful than the rudimentary packages available at the time. Over time, as technology became more complex and rules on independence stricter, CPAs gravitated away from reselling the software. Now Sage MAS 90 is primarily re-sold by a network of independent software consultants. Sage MAS 90 primarily targets the wholesale distribution industry, and most of the continued development and enhancement to the software line is centered around the wholesale distribution and warehouse management niche. However, it has many enhancements making it suitable for other industries as well; at present, there are over 20 separate software modules, including some for light manufacturing and e-commerce. Sage MAS 90 operates in a file server environment. Sage MAS 200 is functionally equivalent, but operates in a client-server environment running under Windows 200x operating systems.
