The advantages of computers are many.  One advantage is their time saving nature.  It is much quicker to type a letter than to write one with a pen.  The connection to the internet is of great use.  The ability to research something or ask questions in real time is amazing.  The amount of data that can be stored, manipulated, and retrieved is phenominal.  Using the computer save natural resources by limiting our need of paper and pencils.
Computers have put millions of people out of work. For example, they have ravaged the book-selling business. Book stores are closing all across the country because it is so much more convenient to buy books online and so much easier to find the books you want. But in many cases it is possible to read books on the monitor or to print them. Computers have created jobs but not as many as they have displaced. They are only in their infancy, too. More and more shoping  is being done online. Even the supermarkets are being affected. It looks as though the cities are going to be transformed in coming years, and many small towns are already being wiped out of existence.
Another disadvantage of personal computers is that they are addictive. Everywhere you go you see people staring into their laptops, and you may wonder, as I do, what they are thinking and what they find so hypnotic.
Mark as Best pLz :P :)
nice points but its on primary level :D
negative points :-
   - it effects on our eyes if we are giving lots of time on computer .
   - it effects our brain .
   - if we giving much time on computer it effects our relationship and personal life .
   - if we giving much time on computer person become sick 
   - it effects our health our life badly due to adult sites .
  - excessive computer use effects our back problems and pain .
  - e
xcessive computer use can take an emotional toll
  - today children are playing video games that effects on education 

positive effects are :-
   - computer is perhaps greatest thing which is invented by a man . 
  - it becomes very important in our life that never before .
  - it helps to perform complex tasks easier to work
  - it is essential for children as well as peoples to get more education  .
  - it gives us information of the world in just a click through internet .
  - today we are using computer as a friend .
 - it helps in communications .
 - it makes us ease making and full dependent . 
good points for kids actually , i like them ..