MARS-101

MARS-101 (Magnetic-electronic Automatic Reservation System 101) was a real-time online system developed by Japan National Railway (now called Japan Railway) for seats reservations　as a succesional system from MARS-1.

This system was able to make reservations, ticketing and processing statistics for all over Japan. The central unit was installed at the computer room of Akihabara Station in 1963. And this system had started the seat reservation operation for the 2400 seats of　four express trains since February 1964.

MARS-101 system consisted of the central processing unit which had central processing units of HITAC 3030, drum memory units, magnetic tape devices, and etc at Akihabara station and each terminal at counter of major stations for ticketing. In 1965, MARS-102 for group reservation was developed. Both system in all were able to operate for the 130,000 seats of 238 express trains, then Midori-no-Madoguchi (Green Windows) were newly opened at major stations and seat reservation service was expanded to all over Japan. All devices of this system have been preserved by The National Museum of Nature and Science, Tokyo.