FreeBSD turns 21
I like how they consider birth as "construction ready".<p>Oh and a side note. Being based off the original BSD its roots go back to 1977 and even earlier.<p><a href="https://upload.wikimedia.org/wikipedia/commons/7/77/Unix_history-simple.svg" rel="nofollow">https://upload.wikimedia.org/wikipedia/commons/7/77/Unix_his...</a>