Beginning of Essay
The computer is a high-speed electronic machine that handles information automatically to produce conclusions or actions useful to people. The computer is, without a doubt, the most complex machine ever devised and one of the most significant inventions of all tim ....

Middle of Essay
.... as analog or digital. Both types process data, but in different ways. Analog computers are best suited to solving problems in which several quantities vary continuously over a period of time, making exact answers difficult or impossible to obtain. Digital computers are capable of providing exact answers to problems. The basic concept of a computer is very simple. A computer processes step by step, performing one operation at a time. For example, a computer reads a number from memory, stores it, reads another number from memory, stores it, retrieves the first number, adds it to the second, and writes the answer into memory. This is a computers ....