This document summarizes the economic importance of mammals. It discusses how mammals are used in agriculture for tilling soil and as manure, in transportation by being used as beasts of burden, as scavengers, in laboratories as research animals, for hunting and sports, as pets, in zoos, for recreation, and as a food source by providing meat and milk. Mammals like cows, buffalo, and goats provide the bulk of the world's meat and milk supply which are important foods for humans.