That unicode page contains a lot of history about international trade...
@foone
Or if you use Linux or similar you can add lower & upper case Greek to .Xcompose in home.
Then Compose g m gives μ
g l gives λ
G P gives Π
G O gives Ω
etc.
I have CapsLock as the Compose key.
I also added prime and double prime for feet/minutes inches/seconds: ′ and ″
Both typewriter ' " and regular quotes ‘ “ are wrong.
@Klassika @foone I find quite horrible seeing "mcg" for micro gram, but now that you tell me it has sense, given doctors calligraphy...
In old electronics you could find "mmF" as milli-milli-Farad, instead of micro.
Oneof the funniest, that I've seen in use through the 70s and 80s is "kpF" as kilo-pico-Farad, instead of nF, for nano-Farad. Maybe has it's root in the pF subunit, quite widespread. Anyways, one of the most horrible down and up scaling.