"Development started in 1969 First manual published internally in November 1971[1] Announced outside Bell Labs in October 1973" https://en.wikipedia.org/wiki/Un

"Development started in 1969 First manual published internally in November 1971[1] Announced outside Bell Labs in October 1973" https://en.wikipedia.org/wiki/Unix https://en.wikipedia.org/wiki/Unix I am confused: what would be the birthday of unix? Would that be an initial release or the start of development?