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Systems Application Architecture (SAA), introduced in 1987,〔(【引用サイトリンク】url=http://www-03.ibm.com/ibm/history/history/year_1987.html )〕 is a set of standards for computer software developed by IBM. The SAA initiative was started in 1987 under the leadership of Earl Wheeler, the "Father of SAA". The intent was to implement SAA in IBM operating systems including MVS, OS/400 and OS/2. AIX, IBM's version of the UNIX operating system, was not a target of SAA, but does have interoperability with the SAA family. SAA did not define new standards, but selected from among IBM's existing guidelines and software. IBM also purchased some third party software from developers such as Bachman Information Systems, Index Technology, Inc., and KnowledgeWare, Inc. These were intended to be implemented uniformly across all SAA compliant environments. The standard was "designed to make application programs look and work in the same manner across the entire range of the company's personal computing systems, midrange processors and System/370 processors."〔(【引用サイトリンク】title=IBM Archives: 1987 )〕 SAA was labeled "complex, obscure, and potentially difficult to learn." Under Lou Gerstner IBM later quietly discontinued use of the "SAA" umbrella. By 2001, SAA was being spoken of in the past tense. However many of the individual components of SAA are still in use . ==Common programming interface (CPI)== The Common Programming Interface attempted to standardize compilers and application programming interfaces among all systems participating in SAA, with the objective of providing "a common programming interface for the entire IBM computer product line - PCs, System/3x, System/370. This implies that under SAA, a program written for any IBM machine will run on any other". CPI included a number of pieces:〔 * Programming languages — PL/I, COBOL, Fortran, C, RPG and REXX * Application generator — IBM Cross System Product (CSP) * Database access — SQL * Query interface — QMF * Presentation interface — the OS/2 Presentation Manager was a full implementation of the SAA presentation interface. IBM Graphical Data Display Manager (GDDM) provided compatible SAA graphics support for MVS and VM. * Dialog interface — ISPF represented the text mode dialog interface; OS/2 represented the full graphical interface. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「IBM Systems Application Architecture」の詳細全文を読む スポンサード リンク
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