Twitter uses several different technologies to operate including:
RSS : a group of web-based feeds that standardize blog posts, podcasts, web sites, etc. and syndicate them into an aggregator in order to share information and allow readers or users to know that the site has been updated
Texting : a short, 160-character electronic message sent via a cell phone using the Short Message Service (SMS)
Who Is On Twitter? As of early 2009, Twitter had more than 10 million users. comScore Media Metrix. April 9, 2009
Who’s on Twitter? Twitter is most popular with 45-54 year-old demographic.
How to Use Twitter All you need is an e-mail and user name.
Find Friends Find people through e-mail, invite friends or search by keyword.