... Lan Anh Nguyen/ ESP/HNUE 1 Unit 1 What is a computer? When you read the following text, you will probably meet words and ... person tells it (10 ) what to do and gives it the appropriate information; but because electric pulses can move at the speed of light, a computer can carry out vast numbers of arithmetic-logical operations ... 1. Every computer has _________ for performing arithmetic operations, operating_________ or magnetized _________. 2. A _________ with a screen is normally referred to as a _________ unit. ...