piano chord
A♭m(maj7)
A♭1C♭♭3E♭5G7
Minor triad, major seventh — the tonic chord of harmonic minor.
Written the other way round it is G♯m(maj7) — the same twelve keys on a piano, a different piece of notation.
What is true of it
A♭m(maj7) is A♭, C♭, E♭ and G — 1, b3, 5 and 7 counted from A♭.
On an instrument that cannot reach all 4, the 5 goes first, in that order.
A♭ in other shapes
Cm(maj7)C♯m(maj7)D♭m(maj7)Dm(maj7)D♯m(maj7)E♭m(maj7)Em(maj7)Fm(maj7)all 374