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Growth in numbers of Twitter subscribers is doubling every month

People intuitively understand "Systems as diverse as genetic networks or the World Wide Web are best described as networks with complex topology. A common property of many large networks is that the vertex connectivities follow a scale-free power-law distribution. This feature was found to be a consequence of two generic mechanisms: (i) networks expand continuously by the addition of new vertices, and (ii) new vertices attach preferentially to sites that are already well connected." Emergence of scaling in random networks
Albert-Laszlo Barabasi, Reka Albert. Science. Washington: Oct 15, 1999. Vol. 286, Iss. 5439; pg. 509, 4 pgs http://proquest.umi.com.dbgw.lis.curtin.edu.au/pqdweb?index=1&did=45780126&SrchMode=1&sid=1&Fmt=4&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1188720192&clientId=22212

Main intentions of users posting to Twitter: Daily chatter about life's routines.
Conversations
Sharing information

Categories of users
Information source
Information seeking
Friends

Why we Twitter