Many discoveries in the last 100 years benefit the people in different ways and different scales, but I believe the benefit of computer tops all.  

Firstly, computer has become a necessary tool of human beings, applied almost in every field. It is very hardly to image the world without computer. Picture this, how could it possible to build up the project like Three Gorge without computer, how could we make the precise calculation for spaceship launching without computer. The precise control of aviation, the management of comprehensive database, the effective virus detection in the seconds and so on, all these things only can be done under the help of computer. Computer is not only providing convenience to the society but also make our works more precise and correct.  

Secondly, computer liberates the people from arduous work and make human beings`s life more enjoyable. For lot of work, it takes several days ever more physically and personally to complete, but computer may complete it in several minutes or ever less. What you require to do is just to press a button or clicking mouse. I am an irrigation engineer and actual computer helps me to earn my bread. I design the works and make drawings with computer, it makes my work more efficiently and easily.  

Thirdly, there are so many danger works treating people`s life, but computer makes it possible to avoid any dangerous work. Robot devised with computer can almost do anything dangerous instead of human beings` physical work.  

All in all, computer is the necessary tool of human beings, it benefits people most than other new discovered technology.

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