RAYDAC

 ( One-of-a-kind Computers ) 

The RAYDAC (for Raytheon Digital Automatic Computer) was a one-of-a-kind computer built by Raytheon. It was started in 1949 and finished in 1953. Oral history interview with Richard M. Bloch, Charles Babbage Institute, University of Minnesota. It was installed at the Naval Air Missile Test Center at Point Mugu, California. The RAYDAC used 5,200 and 18,000 crystal . It had 1,152 words of memory (36  per word), using delay-line memory, with an access time of up to 305 . Its addition time was 38 microseconds, multiplication time was 240 microseconds, and division time was 375 microseconds. (These times exclude the memory-access time.)

• List of vacuum-tube computers

• Erwin Tomash photo of General Front View From Right Side of RAYDAC Test Control Board (image)
• Erwin Tomash drawing of RADAC Computer Control Room Showing Main Computer and Operator's Console (image)