The MBTI (Myers-Briggs Type Indicator) profile is divided in 16 different types of personality.
You find with this test your preference in four dichotomous situations. You get a letter for each situation. And that gives you your type profile.
1) Energy orientation : Extraversion or Introversion
2) Information research : Sensing or Intuition
3) Decision making : Thinking or Feeling
4) Action mode : Judging or Perception
I did online two free tests. The first one is quickly done and very well documented. The second one is longer to do but I recommend it for people who do not have a strict preference for one or the other part of a dichotomy. You will get a more accurate answer about your profile type.
Please find below a brief description of each of the 16 profiles.