MELCOM 1101

This was Mitsubishi Electric's first digital computer, and it was completed in 1960. The MELCOM 1101 was designed primarily for scientific and engineering computation, and was a computer with a 33-bit word, static logic, binary serial operation and a stored program system. All circuits were implemented with transistors. As logic circuit elements, it used approximately 3,500 germanium transistors and 4,000 germanium diodes. For memory, it used a delay-line type magnetic drum with a rotation speed of 3,600 rpm, and capacity was approximately 4,000 words.