Corp is an American shortening of 'Corporation'
For clarification,
Corp, plural
corps from French
corps, from the Latin
corpus "body", is a term used for several different kinds of organization. A military innovation by Napoleon I, the formation (
corps d'armée) was first named as such in 1805. The size of a corps varies greatly, but two to five divisions and anywhere from 40,000 to 80,000 are the numbers stated by the US Department of Defense