We prefer to surf the Internet using computers:firstly,the screen of a computer is larger than that of cell phones,we can see information or pictures more clearly.Secondly,we are used to using computers with keyboards many years before smartphones produced.A habit is hard to change.We use only one finger to type not two hands on the cell phones,it must be slower and it is not suitable to the rapid society.After that,a computer wired out into network always refers a better network signal and never drop out of the Net. I have experienced one thing about dropped out of the Net.One of my stuff used a cell phone to have an Internet meeting which is regarded as very important meeting by our boss.The boss was talking a serious event and he was waiting for us to give him a reply,my stuff dropped out of the Net,she tried to connect again in many ways,but she failed to do so.The boss received everyone's answer except her,after meeting she losed her job.Then,as a computer is not easy to carry,we only use it at work in office of in front of our desks,and we have to sit straightly not to lie down or walking.It is good for our eyes and necks.Finally,our families can share a computer,we needn't buy every one a computer.It can save more money.