01 What is the esoteric programming language Cow?

COW – Esolang (esolangs.org)

Cow belongs to the so-called esoteric programming languages. It was developed in 2003 by Sean Heber on the basis of Brainf**k.

Its salient feature is the commands consisting of the letters M, m, O and o – Moo, moo, moO, etc.