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.

  • IBM