The Tandy Color Computer line started in 1980 with what is now called the CoCo1 and ended in 1991 with the more powerful yet similar CoCo 3. It was one of the more powerful 8 bit computers of its day. All three CoCo models maintained a very high level of software and hardware compatibility, with few programs written for the older model not running on the newer. The converse cannot be claimed, obviously, due to the greater capabilities of the newer CoCo models. The death knell of the CoCo was the advent of lower cost IBM PC clones, the same event that spelled the end of other models competing in the home computer market.