the first tweet

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Jack Dorsey's 2006 message 'just setting up my twttr', the first post on Twitter.

Sent on 21 March 2006 when the service was still spelled 'twttr', it is an unremarkable status line that happened to open a platform that reshaped public conversation. Dorsey later auctioned it as an NFT, an odd coda for five plain words.

Jack Dorsey posted just setting up my twttr on 21 March 2006, which is an unremarkable sentence and an accurate description of what he was doing. The platform was called twttr because short domain names were fashionable and vowels were expensive.

The constraint that shaped everything was 140 characters, chosen so a message plus a username would fit inside an SMS, which was 160. That is a design decision inherited from a carrier limitation, and it determined the medium's entire character: brevity, abbreviation, and the compression of argument into assertion. A different number would have produced a different kind of public conversation.

Everything the platform later became grew out of user behaviour rather than product design. The retweet, the hashtag, the @ reply and threading were all conventions invented by users and adopted afterwards, which is worth remembering when a product roadmap assumes it knows what people will do. The founders built a status update tool and the users built something else inside it, and the interesting history of most successful platforms has that shape.

Also known as: just setting up my twttr, Jack Dorsey first tweet

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