1948 — University of Manchester
The Small-Scale Experimental Machine was the world's first stored-program computer. Built by Frederic Williams, Tom Kilburn, and Geoff Tootill, it stored both programs and data on a Williams tube CRT display.
Memory: 32 words of 32 bits each, displayed as bright/dark dots on a cathode ray tube. On June 21, 1948, it ran its first program: finding the highest proper factor of a number.
Only 7 instructions. The birth of software.