Bis is a Latin prefix or suffix designating the second instance of a thing, thus preceding ter. An example in recent modern usage is the ITU-T modem standard from the late 20th century, V.32bis. Bis can also refer to:
Pachelbel's Canon in D major, a piece of chamber music scored for three violins and basso continuo and originally paired with a gigue in the same key, experienced a tremendous surge in popularity during the 1970s.
G-flat major is a major scale based on G-flat. Its key signature has six flats. Its relative minor is E-flat minor, and its parallel minor is G-flat minor. Its enharmonic equivalent is F-sharp major, whose key signature also has six accidentals.