Twitter has come a long way since its launch seven years ago. But it wouldn't be the company it is today if it some generous investors hadn't stepped up in its infancy.
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Here's a look at the some of Twitter's biggest backers.
Be sure to tune in to CNBC's premier of "Twitter Revolution" on Wednesday at 9 p.m. ET/PT.
—By CNBC's Cadie Thompson. Follow her on Twitter @CadieThompson.