IBM Systems Application Architecture
The System Application Architecture ( engl. Systems Application Architecture SAA) is a collection of standards for cross-system software development, which were introduced by IBM in the late 1980s. The first implementations were included in the IBM operating systems, OS / 2, OS/400 and AIX.
The most important standards within the SAA are:
- CPI - Common Programming Interface is an application programming interface.
- CUA - Common User Access provides recommendations for the design of the user interface.
- CCS - Common Communication Support are recommendations for the integration of application systems in networks.
As a common language for the application control the procedure REXX language was provided.