In our socaity computers and gadgets are the most important things and we don't emagine our life without them. So computers are main part of our socaity which we use them every day

COMPUTER
In our socaity computers and gadgets are the most important things and we don't emagine our life without them.So computers are main part of our socaity which we use them every day. So computers can be classified and disparted their functional abilities. There are PC (personal computer)computers,mini and mainframe computers.
PC computers have ,the second name is desktop,their own processin unit ,monitor,mouse and keyboard.They are used as a personal computer in your home or office.Typical examples are IBM and Apple.The second one is mini computers.It is a class of small general purpose computers.They are a very useful for every one, because they are not heavy and you can transport easily.They can work faster than PC.They have small processors,memory capacity.They come with battery packs which you can use them without electrical outlets. Mainframe computers are the most powerful types of computers which you can use any difficult tasks very easily.They can support more simultaneous processes than a PC.They are used in a big companies,banks and universities.