Part of the Email and messaging glossary:

What is a tweet?

A tweet is a post on Twitter. The act of writing a tweet is called tweeting or twittering. Tweets can be up to 140 characters long, including spaces, and can include URLs and hashtags.

The 140-character limit comes from the 160-character limit required by the short message service (SMS). (Twitter reserved the other 20 characters for usernames.) 

This was last updated in October 2009
Posted by: Margaret Rouse

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