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A bone was found from around 20,000 years ago(17,000BC). This bone was found in Czechoslovakia and had notches in it which shows us the earliest form of the tally system.
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The abacus was first made in China around 500BC, but was commonly used around 1300AD. It was used for mathematical calculations and each bead has a special value.
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The Difference Engine was proposed on June 14th 1822 by Charles Babbage. The Difference Engine was an automatic mechanical calculator.
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The first typewriter that was commercially succesful was introduced in 1868. It was used to write neater letters to people and write important papers to business, people, etc.
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Punched cards started to be in use in the early 1900s. They were mainly used for data entry into computers. By 1937 IBM had around 32 presses at work in NY making up to 10 million cards a day.
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The idea for the mouse came to Doug Engelbart in 1961 when he was sitting in a conference room. This mouse was created around 1964 and had a single button on top with a wheel on the bottom covered by a wooden cage.
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The IBM 1440 computer was first used in 1962. This computer was a low cost system that helped accounting businesses and could process data right away.
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The IBM100 was an 8 inch floppy disk.
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The Xerox Alto was one of the first desktop computers. It was not sold for personal use but sold to businesses.
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IBM made a 5 inch floppy disk following the 8 inch version
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The Apple 1 was created in 1976. It was a personal computer kit.
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The Apple 2 was one of the first highly successful mass-produced microcomputer products.
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Finally IBM made a 3 inch floppy disk in the learly 1980s
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MS-DOS was the made for IBM because IBM wanted an operating system. MS-DOS had basic commands and a basic display.
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This was IBM's first graphics card and first color display card for the IBM computer
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The model F keyboard had 83 keys and was introduced with the original IBM PC, today's keyboards have 101-104 keys
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The IBM XT was the first IBM PC
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The IBM XT/370 was basically an IBM XT but it had 3 custom 8-bit cards
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The IBM PCjr was an attempt from IBM to enter the home computer market
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The IBM AT/370 was an IBM AT but with 2 custom 16-bit cards, same setup as the XT/370
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The IBM Portable computer was a computer the size of a suitcase.
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The IBM AT was the 2nd generation of computers the AT stood for advanced technology.
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Windows 1.0 was released to the public as an operating system. It had more commands than MS-DOS and a better graphical display that made it more user friendly.
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The IBM PC Convertible was the first laptop computer
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The IBM Personal System/2 was IBM's 3rd generation of computers
