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Computer history - Coggle Diagram
Computer history
Stage 1: manual computing
Stage 2: mechanical computers
Stage3: electronic computers
early 20th century
In 1932
during the Second World War
after the end of war
vacuum tubes technology with magnetic tapes
transistor technology
4 more items...
Technology was limited by cost, size and energy comsumption
Univac - first computer: 2000 operations per second; 5200 vacuum tubes; weighed 13 metric tones
power computing was turned towards business and administrative problems
by a British mathematician, Alan Turing
Colossus
It's the first electronic computer. It used electricial relays or valves, punched tape was used to input data
were very large and slow. Perform calculations and also to store some of data while it was being processed
by Bush from the Massachusetts Institute of Technology in the USA
Differential Analyzer
the calculations were carried out using different sets of gears. It used electrical motors and it wasn't programmable
much more powerful and could perform large numbers of calculations much more quickly
Herman Hollerith in the USA
Tabulating Machine
a combination of punched card and mechanical gears
to speed up the processing of information from the US Census or population count
Colossus
built using electronic valves and relays
Pascaline
In 1645
hand-powered adding machine which could add
numbers up to eight figures long
Purpose: add numbers up to 8 figures long
Difference Engine
In 1991
Jacquard Loom
controlled by a set of cards with holes in them
In 1801
Purpose: produce fabrics with very inticate designs much more quickly and efficiently
abacus
10 fingers on the hand
Purpose: to speed up addition
before 17th century
Napier's Bones
series of numbers written on narrow strips of material
Purpose: to speed up multiplication and division
ahead to the early 17th century