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The first computer is invented in 1800s and it used to solve hard math problem in a punch card.Usually this punch card used by a big company to count

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The analytical engine is a computer that's also to solve hard math problem and its more advance then the punch card. Its work by using gears and crank.

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Codebreaking machine is invented in 1940

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Codebreaking machine is invented in 1940

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Codebreaking machine invented when the world war 2. Codebreaking machine is to send secret messages. The different from analytical engine is the codebreaking machine is already alphabet so the military doesn't get caught by his enemy. The first programmer is a girl her name is Ada Lovelace. She wrote the code to the analytical engine so the analytical engine can work.

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Mainframe is a very big computer. Its consist of tape drive, tape, keyboard and monitors. mainframe can fill up 1 room but its worked very slow. Usually its used by a big company to track their business.

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Personal computer invented in 1980s and its more advanced and much smaller then mainframe. You could do anything with your personal computer such as write, save photo to a file and others thing.

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Most computer is connected  to a international network or internet but now we used Wi-Fi. In laptops they had Wi-Fi. Laptops is more smaller than pcs and much advanced so you can take it. Laptops consist of key board and screen.

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Now days there is a super computer that's allow you to watch, save files, writing, call, video call, taking photo and others. super compute is consist of monitors, keyboard and mouse.

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Future computer can do more things like Leap motion and ai . Leap motion is controlling your computer with your hand and moving your hand. Ai is a robot that act like a human.