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Computing History - Coggle Diagram
Computing History
Stage 1: manual computing
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
Stage 2: mechanical computers
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
Stage3: electronic computers
Colossus
built using electronic valves and relays
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