Today in History – March 13,1970 – PDP-11 minicomputer introduced by DEC (Digital Equipment Corporation) and remained in active production until 1996. It was one of the most popular 16-bit minicomputers ever produced.
PDP-11 and its successor, the VAX-11, lived over almost three decades during the time DEC rose to number two computer [...]

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James Chadwick and the Alsos Digital Library for Nuclear Issues

Today in History – February 27, 1932 – Chadwick publishes his discovery of the neutron. Until 1932, the atom was known to consist of a positively charged nucleus surrounded by enough negatively charged electrons to make the atom electrically neutral. Most of the atom was empty [...]

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Today in History – February 25, 1837 – Thomas Davenport patents the electric motor and electric railway. Thomas Davenport, an American blacksmith, first invented the DC electrical motor in 1834 and used it to make a small model of electrical railway in 1835. He patented a device for “Improvements in propelling machinery by [...]

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Today in History – February 17, 2009 – Television originally scheduled to go digital in the U.S. Congress mandated this as the date when all full-power TV stations would cease to broadcast analog programming. This transition to digital television was promoted as enabling more efficient use of the nation’s airwaves, including allowing new [...]

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Today in History – February 6, 1959 - Kilby patents the integrated circuit.
Jack Kilby at Texas Instruments and Robert Noyce at the small Fairchild Semiconductor start-up company were both working on the concept of an integrated circuit in 1958. Prior to this invention, only parts of a circuit – such as the transistor [...]

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