Similar to 互恵的利他主義

Annals of Mathematics

AOL

AST/ALT ratio

Axiom (computer algebra system)

B

BASIC

Bücker Bü 133 Jungmeister

C++ Technical Report 1

Boeing C-135 Stratolifter

Cpio

C++

Darwin Information Typing Architecture

Yawn

Play (activity)

Temperament

Tree climbing

Burping

Aggression

Cleaner fish

Pollinator

Superorganism

Nectar robbing

Instinct

Blinking

Imitation

Tit for tat

Game theory