Colossus

Overview

Colossus, created in 1943, was a very early electronic computing system. Its core was built with vacuum tubes, and although it had fairly limited utility, it ushered in the use of electronic vacuum tubes for a generation of computer systems that followed.

Source

• The Future of Computing Performance: Game Over or Next Level?, at 66.

External resource

• "Colossus: The Secrets of Bletchley Park's Codebreaking" (B. Jack Copeland ed. 2006).