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3. Mention at least 8 things that happened during the computer pre-history period mentioned in class. Explain why they are considered important enough to be in such timeline.

All these inventions are called prehistory because they were the instruments for creating computers, they were the first step of mathematical calculations without using human brain. So without this artefact computer would have never been created. People thought that a computer was not useful for have it as a personal item, because there were too big or simple forthe fact that there didn't have a border view. Every change or computer generation was important because thanks to them, the modern computers work, now a days computer are cheaper than before and more easy to have. Before, the CPU was as big as a refrigerator. So this 8 thing marked the computers history, they are vry important because thanks to this computer devoleped better and advances quite much, now even withput humans brain computer can do everything. Ancient people wanted to create a calculator, basically what they were looking for was a method in which they could count money or any thing without doing it one by one.

- abacus: it was created even before christ and was used to make simple calculations such as: adding, substracting, multipling and dividing. - machines that counted the money: were created for train stations and were useful to count the money they recived. - calculator: was useful for more complex calculations and was faster than the abacus. - civilizations created their own counting method (numbers) to make it easier to substract, sum, divide and multiplicate. -ancient civilization never though of computers as we know them. they started as calculators only, they had no memory or output.