What does BUT stand for?

Basic Unit Training

Biuntrium - Chemical element (EPT)

Board Under Test (SAUS)

Breakup Time - Ophthalmology

British United Traction Co.

Broadband Unbalanced Transformer - Telecommunications (OA)

Bungain - Language code (ETLW)

Bureau of University Travel - Defunct

Business Air Taxi - Switzerland - ICAO designator (FAAC)

Bus Utilization Table - Climatology (CERES)

Butanol - Organic chemistry

Butte - Montana - Seismograph station code, US Geological Survey (SEIS)

Butter (AAMN)

Button

Butyrum - Butter - Pharmacy (ROG)

E. R. Butler & Sons, Marblehead, MA - Manufacturer code for watercraft hull identification number (USCG)

Jesse S. Butterfield - NCIC firearms make code (NCIC)

Buttress - Construction term (MIST)