Although some mainframe, minicomputers had been designed as single-user systems in the 1970s, and home computers such as the Atari 800, released in 1978, and the BBC Micro, released in 1981, together with programmable calculators such as the HP 9800 series released in 1971 were available, the history of the personal computer as a mass-market consumer electronic device began in 1981 with the launch of the IBM Personal Computer that coined both the term Personal Computer and PC.