well, Where you focus your attention – Extraversion (E) or Introversion (I) The way you take in information – Sensing (S) or INtuition (N) How you make decisions – Thinking (T) or Feeling (F) How you deal with the world – Judging (J) or Perceiving (P)

but that's not all to MBTI (Myers brings type indicator) i can tell you all about it