Local lore, backed by Jack Dorsey, has it that he proposed the idea to fellow Twitter co-founders at a playground in San Francisco.
But journalist Nick Bilton, author of "Hatching Twitter: A True Story of Money, Power, Friendship and Betrayal," says the history is not quite that simple.
Dorsey was a key member of Twitter's founders, but it was a collective effort, The New York Times journalist argues.
"In fact, Dorsey forced out the man who was arguably Twitter's most influential co-founder before the site took off, only to be quietly pushed out of the company himself later," Bilton wrote.
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"They were always talking about where they were going, what they were doing, and that is where the idea for Twitter came from," Dorsey said in CBS News interview.
"Suddenly, we had these phones and I could update where I am, what I'm doing and how I feel."
Dorsey was a recent transplant to San Francisco when spotting locally renowned entrepreneur Evan Williams in a cafe prompted him to email a resume that landed him a job at Odeo.
Dorsey earned a reputation as an engineering star at Odeo. In Silicon Valley style, Dorsey mixed social and work life, becoming close with Glass, according to Bilton's book.
After Apple added podcasts to iTunes, knocking the legs from under Odeo, Williams considered shutting down the company and Glass turned to co-workers for ideas regarding a new path for the company, according to Bilton.
Dorsey is credited with coming up with the idea for Twitter when Williams gave workers at Odeo two weeks to work on new projects.
The platform let people fire off one-to-many text messages limited to no more than 140 characters.
The book tells of a night of drinking in early 2006 winding up with Glass and Dorsey talking in a parked car.