In personality typology, the Myers–Briggs Type Indicator (MBTI) is an introspective self-report questionnaire indicating differing psychological preferences in how people perceive the world and make decisions
Letter positions
The first letter in your MBTI type is how you get your energy
E: Extraversion I: Introversion
The second letter in your MBTI type is how you learn
S: Sensing N: is for the Intuition (I has been taken)
The third letter in your MBTI type is how you make decisions
T: Thinking F: Feeling
The fourth letter in your MBTI type indicates how you organize your life