system
A chat on 4chan
human
Can someone explain the mbti letters and what they mean 

Besides the introvert and extrovert dimension 

Wtf are the others every website says different things. What is the retard definition please and thank you.
gpt
The 2nd one is sensing/intuition. Sensing types are more routine driven and love sensory experiences. Intuitives are more creative and open to things.
3rd is thinking/feeling basically what it says how u prefer to go about your decisions do you use your head or heart more
Final one is perceiving/judging perceiving types are less structured and are usually stereotyped as disorganized. Judging more put together ig.
The a and t types are just shit that 16personalities made up and aren't actually used in the original theory.

The 4 letter system in 16personalities is kind of dumb. its not true to the actual theory that is much more complicated and interesting. (cognitive functions, grips, loops, etc) Anon is right though that big five is better. Enneagram is cool too