| 1. |
around 1,000 B.C. |
People used stone trays with dust and dirt to do calculations. They used finger prints to count, then they started using stones.
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| 2. |
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The abacus was invented by a scientist in Asia. |
| 3. |
1643 |
Blaise Pascal, a French mathematical invented a mechanical calculator that used wheels and gears to add and subtract numbers. |
| 4. |
1832 |
Charles Babbage designed the Analytical Engine, an unsuccessful machine that was supposed to calculate several problems and remember them, but other inventors used his ideas. |
| 5. |
1937 |
George R Stibitz, an American mathematician invented the first ever electric binary adder, that used binary digits of 1s and 0s to solve math problems. |
| 6. |
1944 |
Howard H. Aiken invented the first ever electric calculator. It was as long as half a football field!!!!!! It had a bunch of wires. |
| 7. |
1946 |
John P. Eckert & John W. Mauchly built a machine called the ENIAC (Electronic Numerical Integrator and Caculator) It was very fast, but huge! |
| 8. |
1947 |
The transistor was invented it was way smaller and lighter then the vacuum tube, that was used in earlier computers. |
| 9. |
1959 |
Microchip was invented, it was so tiny that it had to be built under a microscope (hints the name microchip). It could store lots of information in a small chip. |
| 10. |
1981 |
IBM PC was invented, it used an operating system called DOS, and instead of using a mouse, you have to type in special codes to tell the computer what to do. (You will learn about DOS and operating systems in the System Software section) |
| 11. |
1984 |
The Macintosh computer was invented, it used a mouse a screen where you can click on the icon, instead of having to type in special codes. |
| 12. |
Today |
Now we have many computers, and everyday computer technology improves. |
History
