Shares of short messaging service Twitter Inc. are expected to begin trading Nov. 7. The much-awaited initial public offering on the New York Stock Exchange could raise $2 billion. Twitter, which lets users post 140-character messages called "tweets"to other Twitter users, or “followers,” is a important marketing and communications tool for many companies and organizations.

Following is a list of 100-plus Georgia organizations and individuals with some of the largest followings on Twitter, ranked as of Nov. 4/Nov. 5.

Organization/Handle/Followers:

1. Ludacris @Ludacris 8,513,151
2. T.I. @Tip 4,753,570
3. Tyler Perry (director, producer, actor) @tylerperry 3,258,421
4. The Coca-Cola Co. @CocaCola 2,095,255

Full List