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Abstract - There are six state polytechnics aged 36 years old in Indonesia. The six polytechnics have machining workshops with the same number and machines. The problem that arises in Semarang State Polytechnic is the maintenance system that has not been integrated into a system, even though the electronic maintenance and repair activities have been carried out. The purpose of this study is to develop a maintenance information system that can control all of its activities well. The system is built with an object-oriented approach implemented by android. Research results include: database systems, web application systems, and android application systems that have delivered output correctly.