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INVENTION OF ABACUS
The first abacus in the world was invented in China in 2600 BC. It was conceived because of commerce to make calculations. -
Dec 10, 1500
COG-WHEELED
Leonardo invented the cog-wheeled. It was used to make calculates. -
SLIDE RULE
William Oughtred invented the slide rule in 1621. It was used until 1970s. -
PASCALINE
Blaine Pascal invented the Pascaline which could make additions and subtractions. Inside it there were a system of gears turned by hand. -
IMPROVEMENT OF PASCALINE
Gottfried Leibniz improved Pascaline adding multiplication, division and square root capabilities. -
A MODEL FOR THE DIFERENT ENGINE
The outcome of a scientist's effort was a blueprint for the Different Engine: a machine which should work quickly and without the. But it was never completed. -
ANALYTICAL ENGINE
Babbage conceived the Analytical Engine.
●It could make sequential control, branching and looping based on the predecessor results. I
●t could contain 1,000 variables of 50 digits each.
●Its programs were written on punched cards.
●when there was an error, it rang a bell. -
ELETRIC TABULATING SYSTEM OF MACHINES
Dr, Herman Hollerith conceived It, which compiled the census mechanically. Thanks to it the censuses was completed in six weeks.
