help~~~ computer studies 20pt

Definition of BT (BitTorrent)?
Bittorrent is a technology for those interested in peer to peer. Whereas the conventional peer to peer system takes files from computer A to computer B and distributes the data far more effectively. It is based around packet switching as are most programs but the packets take a different form. Bit torrent files are split into small packages which can be downloaded independently from one another.

Definition of Instant Message?
Instant messaging allows you to maintain a list of people that you wish to interact with. You can send messages to any of the people in your list, often called a buddy list or contact list, as long as that person is online. Sending a message opens up a small window where you and your friend can type in messages that both of you can see.
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Can you list any software application of Instant Message?
ICQ, MSN Messenger, Yahoo! Messenger..

Definition of Short Message Service (SMS)?
It is a technology that enables the sending and receiving of messages between mobile phones.