+* lilypond: (lilypond-usage)Running lilypond. Invoking the LilyPond program.
+* abc2ly: (lilypond-usage)Invoking abc2ly. Importing ABC.
+* convert-ly: (lilypond-usage)Updating files with convert-ly. Older LilyPond versions.
+* etf2ly: (lilypond-usage)Invoking etf2ly. Importing Finale.
+* lilypond-book: (lilypond-usage)lilypond-book. Integrating text and music.
+* midi2ly: (lilypond-usage)Invoking midi2ly. Importing MIDI.
+* musicxml2ly: (lilypond-usage)Invoking musicxml2ly. Importing MusicXML.