- Richard Rastall
As used in the notation of music, abbreviations fall into two main categories: modifications of normal note shapes, signs etc.; and verbal instructions that replace fully written-out music. Abbreviations are far more common in manuscript than in printed music.
Modified note shapes and other non-verbal signs usually represent repetitions of passages of music, varying in length from a single note to a large part of a movement. Other abbreviations of this type avoid such clumsy features of notation as leger lines. ...