Would a Twitter expert out there please answer the following:?

[InnoScentz]

1) Is it free to both or only one party?
2) to what extent do I need a computer?
3) How are the tweets received?
4) Is it web based or does it require a download?
5) How does the Tweeter Tweet to the Tweeted?

[Boboo]

1. Free to both parties
2. You can tweet via txt's on your mobile phone. You will need a computer to subscribe though.
3. Tweets can be received via the twitter website, a twitter client, or via txt on your mobile phone.
4. you can use the webbased version on twitter.com, or you can download a client, which often has a more functional interface.
5. Tweeters tweet to the tweeted using the @name or via Direct Messages (DM)