There are four dichotomies including 2 opposing styles each, which makes a total of 8 different styles. The 8 styles are Extraversion (E), Introversion (I), Sensing (S), iNtuition (N), Judging (J), Perceiving (P), Thinking (T) and Feeling (F). Once it is determined what an individual style for the four dichotomies is, a four letter code is obtained. These four letters are the initials of each of the preferred styles.