Down-sizing, client/server model and multi-vendor type, which are current of the recent computer system, have brought renovation into system development. That is to say, it is the method to combine multiple package softs originally minimizing the efforts of developing original software.ALPS ELECTRIC Co., LTD. MAGNETIC DEVICES DIVISION constructed a document retrieval system and a patent information system as subsystems of integrated technical information system in which three units of hardwares, each made by different companies, and three kinds of commercial softwares are employed. The author describes the outline of these systems, and the concepts of each, compilation of thesaurus and the development steps.
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