Scales 'A'

A Major (Ionian)

A Natural Minor (aeolian)

A Harmonic Minor (aeolian #7)

A Melodic Minor (aeolian #6 #7)

A Minor 7 (Dorian)

A Dominant 7 (Mixolydian)

A Minor Pentatonic

A Major Pentatonic

A Natural Minor flat 2 (Phrygian)

A Lydian (Tritone) (think of this as the major scale with a #4). (Or, Major scale of the 5th Degree - e.g. E Major starting on A)

A Locrian (think of this as the "flat 2" major scale: - E.G. B flat Major starting on A)