Myers-Briggs is based on 4 different dichotomies, that as a result give you 16 different personalities.
1. Our interaction with the world and how we direct & receive energy [ E or I]
2. How you absorb and take in information [ Sensing or Intuitive ]
3. How you make decisions [Thinking or Feeling]
4. How you organize or approach the world around you [Judging or Perceiving]