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wasn't Docs an acquisition too? dunno about Sheets but it wouldn't surprise me at this point

yes, docs came from writely. sheets came from xl2web.

Tensorflow was also an aquihire.

You're conflating Google Brain with Deepmind. Tensorflow was decidedly not an "acquihire".

this is not correct. TF was originated and written by Jeff Dean and some other folks after their experience with distbelief.

Youtube too