Most of DARPA’s outlier output happened before 1972 when it was ARPA

ARPA became DARPA in 1972 because of the increased scrutiny on military spending both in the government and outside of it .

Just looking at the DARPA “best hits” timeline for wildly impactful technologies, the difference before and after 1972 is pretty stark.
Before 1972:

Some of these are still pretty significant - both autonomous cars and voice technology are arguably very important and haven’t reached their potential yet. Therefore, there are still valuable things to be learned from post-1972 DARPA.

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