"The VIC-20 (Germany: VC-20; Japan: VIC-1001) is an 8-bit home computer which was sold by Commodore Business Machines. The VIC-20 was announced in 1980, roughly three years after Commodore's first personal computer, the PET. The VIC-20 was the first computer of any description to sell one million units.
The Vic 20 was the predecessor to Commodore's hugely successful home computer "Commodore 64". It featured 8 colours, and a multi-colour graphic mode (with a maximum of 3 colours + background on each 8x8 pixel block, with decreased resolution), and a single channel sound chip."
Source: Wikipedia, "Commodore_VIC-20", available under the CC-BY-SA License.