Unit 1What is a computer?When you read the following text, you will probably meet words and expressions that are new to you. First try to understand their meaning from the context – read the same passage a few times. When you have read the whole text, check new words in a dictionary. A computer is a machine with an intricate network of electronic circuits(Điện xoay chiềuthat(1) (!computer) operate switches or magnetize tiny metal cores. The switches (nút?), like the cores, are capable of being in one of two possible states, that is, on or off, magnetized or demagnetized. The machine is capable of storing and manipulating numbers, letters, and characters. The basic idea of a computer is that we can make the machine do what we want by inputting signals that turn certain switches on and turn other off, or that magnetize or do not magnetize the cores.The basic job of computers is the processing (xử lí?) of information. For...