-
The first abacus in the world was invented in China in 2600 BC. It was conceived because of commerce to make calculations.
-
Leonardo invented the cog-wheeled. It was used to make calculates.
-
William Oughtred invented the slide rule in 1621. It was used until 1970s.
-
Blaine Pascal invented the Pascaline which could make additions and subtractions. Inside it there were a system of gears turned by hand.
-
Gottfried Leibniz improved Pascaline adding multiplication, division and square root capabilities.
-
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.
-
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. -
Dr, Herman Hollerith conceived It, which compiled the census mechanically. Thanks to it the censuses was completed in six weeks.
