Sinclair ZX81 Launched

March 5, 1981

The Sinclair ZX81, the successor to the ZX80, is launched in England. Designed to be a low-cost introduction to home computing, the ZX81 was the first personal computer to be later sold in the United States for under $150. More than 1.5 million units were sold worldwide and created a lasting legacy among nascent programmers and early personal computer users.