Timeline of Computer History

Wilkes with the EDSAC
Maurice Wilkes assembled the EDSAC, the first practical stored-program computer, at Cambridge University. His ideas grew out of the Moore School lectures he had attended three years earlier.

For programming the EDSAC, Wilkes established a library of short programs called subroutines stored on punched paper tapes.
Technology:vacuum tubes
Memory:1K words, 17 bits, mercury delay line
Speed:714 operations per second
Manchester Mark I
The Manchester Mark I computer functioned as a complete system using the Williams tube for memory. This University machine became the prototype for Ferranti Corp.´s first computer.
Start of project:1947
Add time:1.8 microseconds
Input/output:paper tape, teleprinter, switches
Memory size:128 + 1024 40-digit words
Memory type:cathode ray tube, magnetic drum
Technology:1,300 vacuum tubes
Floor space:medium room
Project leaders:Frederick Williams and Tom Kilburn
People & Pop Culture
   Thomas Watson Jr., speaking to an IBM sales meeting, predicted all moving parts in machines would be replaced by electronics within a decade.


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