Bn.

also bn. bn. is a written abbreviation for billion. total value, dollars $15.6bn.

Abbreviations in music are of two kinds, namely, abbreviations of terms related to musical expression, and the true musical abbreviations by the help of which certain passages, chords, etc., may be notated in a shortened form, to the greater convenience of both composer and performer.

Abbreviations commonly used when writing about music Use "m." or "measure" when referring to one bar only, and "mm." when referring to a number of bars (i.e., mm. 59-62).

billion abbreviation(British English) ​(in writing) billion.

With a number, "billion" can be abbreviated as b, bil or bn. In standard form, it is written as 1 × 109. The metric prefix giga indicates 1,000,000,000 times the base unit. Its symbol is G.

Bassoon (Bsn.)

abbreviation. Music. basso continuo. blind copy: used as a notation on the copy of a letter or other document sent to a third person without the addressee's knowledge.: Also bcc.

beat The beat is how we measure time in a song, counted as beats per minute (BPM).

4 beats Most songs have 4 beats in a bar. You can count 1 – 2 – 3 – 4 – 1 – 2 – 3 – 4 – … during the whole song (when the time signature doesn't change during the song). Another common type of songs has 3 beats in a measure.

Abbreviated Forms

Brown Click image to enlarge. Brown (BN): PCGS designates Brown for copper coins that have less than 5% of their original mint red color. Braided Hair Cent, 1851 1C, RB, PCGS MS66RB. Click image to enlarge.

If you write a 1 followed by nine zeros, you get 1,000,000,000 = one billion!