| Developer(s) | Open Systems, Inc. | 
|---|---|
| Stable release | 7.6  November 1, 2010 | 
| Operating system | Windows XP or later, Linux, Mac OS X | 
| Type | Accounting software | 
| Website | www | 
Open Systems Accounting Software (OSAS) is a business accounting software package for small- to medium-sized businesses using the Microsoft Windows, Linux, and Mac OS X operating systems. It has been developed and sold since 1976 by Open Systems, Inc. of Shakopee, MN. [1]
OSAS is currently programmed in the Java-based BBj language developed by BASIS International. [2] The Java implementation allows installation of OSAS on a variety of platforms. [3]