LMSplus offers useful software that allows the user to design circuits and PCB fast and accurately using the Mentor Tool. It provides the functions of DMGR, DA, DA_LMS, Librarian, Layout, Fablink, and Library Manager (lms_libr). In particular, the LMS Catalog is made into a database, which can be connected with the database of the mainstay system. It is developed in AMPLE language, so anyone can install it easily. Mentor Tool has multiple functions, so users who are familiar with the Mentor environment can use it easily. It develops and provides the functions customers want, in terms of maintenance and repair.