Part 1 of Essay
Whether you know it or not you depend on computers for almost every thing you do in modern day life. From the second you get up in the morning to the second you go to sleep computer are tied into what you do and use in some way. It is tied in to you life in the most obvious and obscure ways. Take for example you wake up ....

Part 2 of Essay
.... These type of computers are considered analog computers. Another analog computer was the circular slide rule. This was invented in 1621 by William Oughtred who was an English mathematician. This slid ruler was a mechanical device made of two rules, one sliding inside the other, and marked with many number scales. This slide ruler could do such calculations as division, multiplication, roots, and logarithms. Soon after came some more advanced computers. In 1642 came Blaise Pascal's computer, the Pascaline. I ....