C
F
Bb
Eb
Ab
Db
G
D
A
E
B
Gb
△9
7
9
-7
+7
Ø
O
-△
△#5
7#11
7#9
7#5#9
7b9
-9
-7b9
Maj
Min
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Intro Theory

Chords are built from scales and the chord qualities listed are shorthand for a particular scale. You wouldn't write Eb Lydian Dominant above a measure because it takes too long to read. This is how chord symbols came in to being. They were spawned from the necessity for fast recognition and universal understanding of scales.

Symbol chart

△ - Ionian or Lydian
7 - Mixolydian
-7 - Dorian
+7 - Wholetone
Ø - Locrian #2
O - Whole/Half diminished
-△ - Melodic Minor(minor-major)
△#5 - Lydian augmented
7#11 or 7b5 - Lydian dominant
alt - altered scale
7b9 - Half/Whole diminished