1, The full form of BM is Bermuda. It’s used on Regional ,Countries in Bermuda

Bermuda (officially, the Bermudas or Somers Isles) is a British overseas territory in the North Atlantic Ocean. Located off the east coast of the United States, its nearest landmass is Cape Hatteras, North Carolina, about 1,030 kilometres (640 mi) to the west-northwest. It is about 1,373 kilometres (853 mi) south of Halifax, Nova Scotia, Canada, and 1,770 kilometres (1,100 mi) northeast of Miami, Florida. Its capital city is Hamilton.

2, The full form of BM is Bachelor of Music. It’s used on Academic & Science ,Academic Degrees in Worldwide

Bachelor of Music (B.M., B.Mus., Mus.B. or Mus. Bac.) is an academic degree awarded by a college, university, or conservatory upon completion of program of study in music. In the United States, it is a professional degree; the majority of work consists of prescribed music courses and study in applied music, usually requiring a proficiency performing an instrument. Such a program lasts three to four and a half years.

3, The full form of BM is Bachelor of Medicine. It’s used on Academic & Science ,Academic Degrees in United Kingdom

Bachelor of Medicine, Bachelor of Surgery, or in Latin Medicinae Baccalaureus, Baccalaureus Chirurgiae (abbreviated in various ways, viz. “BMBS”, MB BChir, BM BCh, MB BCh, MB ChB, MB BS, BM, BMed, MBBS etc.), are the two first professional degrees awarded upon graduation from medical school in medicine and surgery by universities in various countries that follow the tradition of the United Kingdom. The naming suggests that they are two separate degrees; however, in practice, they are usually treated as one and awarded together. Usually, students who have graduated with a “Bachelor of Medicine” degree may also practice surgery, because it is equivalent to the “Bachelor of Medicine, Bachelor of Surgery” degree.