For hundreds of years, printed music has been prepared mostly by engraving metal: scratching or punching the notes and ledger lines and all the musical elements into the metal plate (and it was done backwards so that when the paper picked up the ink from the depressions, it would appear correctly). This was a very skilled trade.
Along came music typewriters with noteheads and stems and dynamics markings rather than the alphabet. Typing required less skill than metal engraving, but the pages looked clunky.