IM or Instant Messageing

I really like IM. With Yahoo IM you can put your friends who have yahoo on your Instant Message list and when they are on line they will show up on your screen the good thing about IM is that you don't have to email back and forth which can take some time with IM you write your message and click OK and the other person who you are chatting with will get the message write away. Then hopefully they will IM you back.