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Bell Labs Relay Interpolator is completed
The US Army asked Bell Laboratories to design a machine to assist in testing its M-9 gun director. -
Complex number calculator
In 1939 bell Telephone compleates this calculator -
Harvard Mark 1 is completed
Conceived by Harvard physics professor Howard Aiken, and designed and built by IBM, the Harvard Mark 1 is a room-sized, relay-based calculator. -
Project Whirlwind begins
During World War II, the US Navy approached the Massachusetts Institute of Technology (MIT) about building a flight simulator to train bomber crews. -
First Computer Program to Run on a Computer
University of Manchester researchers Frederic Williams, Tom Kilburn, and Geoff Toothill develop the Small-Scale Experimental Machine (SSEM), better known as the Manchester Baby. -
SSEC goes on display
The Selective Sequence Electronic Calculator (SSEC) project, led by IBM engineer Wallace Eckert, uses both relays and vacuum tubes to process scientific data at the rate of 50 multiplication per second. -
MADDIDA developed
MADDIDA is a digital drum-based differential analyzer. This type of computer is useful in performing many of the mathematical equations scientists and engineers encounter in their work. -
Manchester Mark I completed
Built by a team led by engineers Frederick Williams and Tom Kilburn, the Mark I serves as the prototype for Ferranti’s first computer – the Ferranti Mark 1. -
Plans to build the Simon 1 relay logic machine are published
The hobbyist magazine Radio Electronics publishes Edmund Berkeley's design for the Simon 1 relay computer from 1950 to 1951. -
Ferranti Mark I sold
The title of “first commercially available general-purpose computer” probably goes to Britain’s Ferranti Mark I for its sale of its first Mark I computer to Manchester University. -
First Univac 1 delivered to US Census Bureau
The Univac 1 is the first commercial computer to attract widespread public attention.
