Berners-Lee posts a summary of the project on alt.hypertext

6 August 1991

On 6 August 1991, Tim Berners-Lee posted a summary of the World Wide Web project on several internet newsgroups, including alt.hypertext, which was for hypertext enthusiasts. The move marked the debut of the web as a publicly available service on the internet.

Timeline: 
The birth of the World Wide Web

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