Chord symbols like "Cmaj7" are used in jazz, pop, and lead sheets to convey harmony by representing chord roots and qualities.
Standard music notation represents chords with stacked notes, demonstrating simultaneous play and structure, as in classical and sheet music.
Roman numeral analysis represents chords within a key in the diatonic scale, making it easier to analyze chord progressions and harmonies.
Nashville numbering assigns chord numbers with a diatonic scale, making transposition and adaptation of chord progressions easier.