What are computers? 用两三句英语回答。

They are machines which can help people work.
Computers are good tool for your job.
They can do lots of things.

A device that computes, especially a programmable electronic machine that performs high-speed mathematical or logical operations or that assembles, stores, correlates, or otherwise processes information.

Computer is a tool.
Computer is a technology.
Computer is a man-made thing but cleverer than man.

Without the help of computer, we can’t keep pace with the high speed society; we can’t adapt in this intense world; we can’t make new friends and keep in touch with old ones. The reason is that the society is so complex and stressful and we didn’t turn to computer.