快速阅读下面短文,并完成测验。 What is Computer Computer is a machine that accepts and processes data into information under the control of a stored program. Two parts of a computer are: The actual machinery--wires, transistors, and circuits--is called hardware; The instructions and data are called software. With software, a computer can execute a program. Computer technology is the combination of electronic technology and calculating technology. At its early years, computer was produced to do scientific calculation. But now it has been widely used in almost every field. Microcomputer, minicomputer, mainframe computer, and supercomputer are four types of computer system. Microcomputer is the most common and familiar type to us. It can be a desktop model or portable one. Microcomputers are widely used in offices, homes, schools, or companies. Minicomputer can support 2 to about 50 users at the same time and works much faster than microcomputer. They may be used to conduct accounting work or monitor a particular manufacture process. If you go to the airline, a bank or a large insurance company, you may see a mainframe system. Mainframe computers offer faster processing speed and greater storage capacity than minicomputer. They can support thousands of users, and their size can be either big or small. Super computers are giants of the computer world. The processing speed may be thousands of times faster than any other types of computers.