Commodore International, founded by Jack Tramiel, was a significant player in the home computer market through the 1970s, 80s and 90s. Initially finding success with adding machines and calculators, Commodore entered the personal computer market with the acquisition of MOS in 1976. Commodore's personal computer range included the KIM1, PET, VIC20, Commodore 64 (and derivatives) and Amiga computers. In the mid 80's Commodore dominated the home computer market, with the Commodore 64 becoming one of the biggest selling computer models of all time.