Hitachi HITAC 10

The HITAC 10 was Japan's first minicomputer, developed by Hitachi and announced in February 1969. It had a 16-bit word architecture (32-bit words were optional). All circuit elements were implemented in ICs, and magnetic core was used for the memory unit. The system had memory capacity ranging from 4 Kword to a maximum 32 Kword, a cycle time of 1.4 microseconds, an addition/subtraction arithmetic speed of 2.8 microseconds, 16 basic instructions (up to 12 instructions could be added as an option), and could be connected to a maximum of 64 input/output devices. The system was equipped with a data typewriter as a basic input/output device, and paper tape was used as a portable storage media. A double-precision arithmetic mechanism was used for scientific and engineering computation.