FACOM933 ControllerCard Reader

This was the first photoelectric card reader from Fuji Tsushinki Manufacturing Corporation (currently Fujitsu). Computers had progressed from relays to transistors, and there was a dramatic improvement in calculation speed. As a result, there was an increasing need for higher speed in input/output devices. Previously, punched card readers read punched positions by opening and closing contacts with a pin or brush, but this system was mechanical and thus was slow and prone to reading errors due to bad connection at contacts.