System
MBTI
The Myers–Briggs Type Indicator describes 16 types. Each type is an ordered stack of four cognitive functions, which is what the four letters stand for.

Reel 02 · From four letters to a stack01 / 03
I/E
where energy goes
N/S
how you perceive
T/F
how you decide
J/P
how you live outward
Four letters
The code looks like four independent switches. It is shorthand for something deeper.
Pick a type
INFJ Advocate
Vision-focused guide who translates deep meaning into human-centered direction.
Dominant
NiIntroverted Intuition
Auxiliary
FeExtraverted Feeling
Tertiary
TiIntroverted Thinking
Inferior
SeExtraverted Sensing
Chapters
16
Types
Profiles
Every type with its function stack, summary and development notes.
8
Functions
Dynamics
Eight attitudes describing how information is gathered and judged.