What does Bey stand for?

Beyrich - Botanist in plant scientific name (HUH)

Beirut - Lebanon - Airport symbol (OAG)

Beli - Language symbol (ETLW)

Beneteau USA Inc., Marion, SC - Manufacturer code for watercraft hull identification number (USCG)

Bond Equivalent Yield - Business term (EMRF)

Butte, MT - Location identifier - FAA (FAAL)