I know a very imporant invention. The water wheel!
The water wheel progressed to do funtions such as pounding grain, then by using cogs, camshafts, hols and pegs, people where able to 'program' water wheels to do different task. The technology from the water wheel was intoduced into the weaving loom. By making tough paper cards with holes punched in them, you could store the information for a design that could be made flawlessley on an automatic loom. When immigrants begane to come to the US, officials on Ellis Island used punch cards to store information about people. They would punch holes to store info about age, race, sex ect. Then to use them in a census, they could put the cards in a machine that used electric contacts, if a bit a metal could go though the hole in the card then that person could be counted.
All this led up to the modern day computer!
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