What does BYT stand for?

Bay Yachts, Milwaukee, WI - Manufacturer code for watercraft hull identification number (USCG)

Bentley Resources Ltd. - Vancouver Stock Exchange symbol

Berti - Language code (ETLW)

Bright Young Thing (DSUE)

Buoyant - Telegraphy (PCTE)

Bytom - Poland - Seismograph station code, US Geological Survey (SEIS)