The Type A and Type B personality concept describes two contrasting personality types.

The Type A and Type B personality concept describes two contrasting personality types.

The blood type personality theory is a pseudoscientific belief prevalent in Japan which states that a person's blood group system is predictive of a person's personality, temperament, and compatibility with others.

In mathematical logic and computer science, homotopy type theory (HoTT) refers to various lines of development of intuitionistic type theory, based on the interpretation of types as objects to which the intuition of (abstract) homotopy theory applies.

Intuitionistic type theory (also known as constructive type theory, or Martin-Löf type theory is a type theory and an alternative foundation of mathematics.