Student Response Monitors (SRM) – In 1968, the FAA awarded Disan a contract to design, test, and manufacture a teaching aid known as a Student Response Monitor (SRM) to be used at the academy in Oklahoma City. The unit permits the instructor to ask a question with a multi-choice answer. The student is alerted to the question, enters a chosen answer (A, B, or C) with various programmed options, and the instructor is immediately alerted to the individual answers of all of the students simultaneously. The initial design utilized relay logic. The mechanical and electronic design and fabrication was accomplished in-house.