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August 1991General sourceWell documented

Linus Torvalds announces Linux

On the timeline · around August 1991 · Linus Torvalds announces Linux1986198819901992199419961998

What happened

A Finnish student posted about his hobby OS kernel — "just a hobby, won't be big and professional."

Why it matters

Linux now runs most servers, every Android phone, and the majority of the cloud — open source's flagship.

Sources