The first commercial computer was the IBM 701, which was announced by IBM on April 7, 1952. The 701 was based on the IBM 602, which had been announced in October 1951. The 602 was the first computer to use transistors, which had been invented in 1947.

Is Mark 1 the first commercial computer?

On April 7, 1941, IBM unveiled the Mark 1, the world’s first commercial computer. Weighing in at over five tons and comprising almost 2,000 parts, the Mark 1 was a massive machine. It could perform three basic operations: addition, subtraction, and multiplication.

The Mark 1 was …