16 types
Four pairs of poles from Jung’s dichotomies give a four-letter code, such as ENFP. MBTI, Socionics and CoreTypes are built on this base and read the functions of one code differently.
STSensing and thinking
SFSensing and feeling
NFIntuition and feeling
NTIntuition and thinking
I J
ISTJ
ISFJ
INFJ
INTJ
I P
ISTP
ISFP
INFP
INTP
E P
ESTP
ESFP
ENFP
ENTP
E J
ESTJ
ESFJ
ENFJ
ENTJ