This is the year in which one of the most successful computers ever was introduced, the Commodore 64. This machine is build around the 6502 chip and was sold at a retail price of 595 USD. The total estimation of sales vary between 17 and 22 million computers. The Commodore 64 is also the first computer with a sound synthesizer chip (named: SID, Sound Interface Device), designed by Bob Yannes.