The Commodore 64 failed to make any impact in Japan. but the C64 was still the second most popular computer in the UK after the ZX Spectrum. Sam Tramiel, a later Atari president and the son of Commodore's founder, said in a 1989 interview, 'When I was at Commodore we were building 400,000 C64s a month for a couple of years.' In the UK market, the C64 faced competition from the BBC Micro, the ZX Spectrum, and later the Amstrad CPC 464. For a substantial period (1983–1986), the C64 had between 30% and 40% share of the US market and two million units sold per year, outselling IBM PC compatibles, Apple computers, and the Atari 8-bit family of computers.

The C64 dominated the low-end computer market (except in the UK and Japan, lasting only about six months in Japan ) for most of the later years of the 1980s. With support for multicolor sprites and a custom chip for waveform generation, the C64 could create superior visuals and audio compared to systems without such custom hardware. Preceded by the VIC-20 and Commodore PET, the C64 took its name from its 64 kilobytes (65,536 bytes) of RAM.

Volume production started in early 1982, marketing in August for US$595 (equivalent to $1,670 in 2021). It has been listed in the Guinness World Records as the highest-selling single computer model of all time, with independent estimates placing the number sold between 12.5 and 17 million units.

The Commodore 64, also known as the C64, is an 8-bit home computer introduced in January 1982 by Commodore International (first shown at the Consumer Electronics Show, January 7–10, 1982, in Las Vegas).

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