Second position is a major scale variant with a flatted 7th. The mode is called Mixolydian . Third position is a minor scale. There is more than one minor scale, and the mode for this one is called Dorian . Fourth position is the natural minor scale whose mode is called Aeolian .
Fifth position is another type of minor scale.
The mode for this one is called Phrygian . Sixth position has a sort of major scale feel and is called Locrian . Twelfth position , also called First Flat , has a major scale type feel and is called Lydian . In other words, if you have a key of C major tuned harmonica, first position utilizes the scale tones of the C major scale, which starts on the C note. 2nd position is the most commonly used harmonica position for Blues, Country, and Rock music because it makes use of draw notes much more than 1st position.