I'd like to have a look at the code but all I found is an outdated mirror : https://github.com/ryantenney/gnu-units
http://savannah.gnu.org/projects/units
All official GNU software is hosted here: http://savannah.gnu.org
(Slightly discombobulating to read some of today's lucky 10,000 treating `units` as a (GNU) novelty when it's been around for 40+ years.)
Unfortunately it looks like the upstream for this project is in... cvs
I'd like to have a look at the code but all I found is an outdated mirror : https://github.com/ryantenney/gnu-units