64-4. No more daylight saving in US.
128-1. End of time zones and the embracing of UTC across the entire world.
128-2. Standardization on ISO-8601 for all date formats.
128-3. US uses A* and B* paper sizes.
Yes, NASA is entirely metric but one contractor did work in Imperial but didn't communicate it properly. It crashed into the surface of Mars, IIRC.
@dmoonfire @fitheach You're both thinking of Mars Climate Orbiter: https://en.wikipedia.org/wiki/Mars_Climate_Orbiter#Cause_of_failure
NASA is officially metric but a lot of programs are still in US customary units including SLS (because so much is Shuttle derived) and a lot of the US segment of the ISS.
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