This video answers the questions:
What is the Myers-Briggs Type Indicator?
What is my 4 digit code (personality preference according to Myers Briggs)?
Is the Myers-Briggs a reliable and valid instrument?

The Myers-Briggs converts Jungian psychological types - the work of Carl Jung - into a four-letter code. There are 16 possible personality types or preferences. The MBTI doesn't really measure traits, character, or ability. The four dimensions of the MBTI are:
1. Introverted - Extroverted represented by I and E
2. Sensing - Intuitive represented by S and N
3. Thinking - Feeling represented by T and F
4. Judging - Perceiving represent by J and P



https://www.myersbriggs.org/my-mbti-personality-type/mbti-basics/home.htm?bhcp=1

https://www.myersbriggs.org/my-mbti-personality-type/mbti-basics/the-16-mbti-types.htm

https://www.myersbriggs.org/more-about-personality-type/misconceptions-about-the-MBTI-assessment/

http://www.cppblogcentral.com/cpp-connect/the-myers-briggs-assessment-is-no-fad-its-a-research-based-instrument-that-delivers-results/

https://www.themyersbriggs.com/MBTIvalidity

McCrae, R. R., & Costa, P. T. (1989). Reinterpreting the MyersBriggs Type Indicator from the perspective of the five-factor model of personality. Journal of Personality, 57, 17-40.

http://indiana.edu/~jobtalk/Articles/develop/mbti.pdf