UNIVAC 418

The UNIVAC 418, called in the military field UNIVAC UNIVAC 1218 and 1219, is a mainframe and was developed by Sperry Rand 1963-1969. One goal was to make the machine as small as possible so that it fits on a normal office table. The system was based on transistors and a machine word length of 18 bits. The name 418 was formed of the properties that the machine had four microseconds cycles as well as 18-bit word length.

In all, three different models (418 -I, 418- II and 418 -III) designed and produced throughout over 392 machines. Some machines were in use until the end of 1990.

• The first UNIVAC 418 -I, respectively UNIVAC 1218 was delivered in 1963. She was about 1.8 m high and had a weight of 352 kg.

• The sequel, which, also called UNIVAC 418- II UNIVAC 1219, was delivered in 1964. The duty cycle was reduced from 4 ms to 2 ms. The UNIVAC 1219 was used by the Japanese Navy in the management of its fire control system based on MFCS MK -74 ( Missile Fire Control System) as well GFCS MK -68 system ( Gun Fire Control System). The U.S. Navy used the UNIVAC 1219 in its fire control system based on MFCS MK -76, as well as to control the AN/SPG-55 radar system.

• In Univac 418 -III of the clock cycle was further reduced to 750 ns, as the extended instruction set.