БМ

1) Military: armed vehicle, buggy, (лёгкая) combat car, combat vehicle, fighting vehicle, fighting vehicle system (как система вооружения), fighting-fit truck, mechanized combat vehicle, military vehicle, operational vehicle, vehicle, боевая машина, BM (боевая машина), battle machine, armored vehicle

2) Abbreviation: Байкальский музей ИНЦ

3) Gold mining: благородные металлы (mine)