C. O. D.—Cash (or collect) on delivery.

Col.—Colorado; Colonel; Colossians.

Coll.—Collector; Colloquial; College; Collection.

Com.—Commerce; Committee; Commentary; Commissioner; Commodore.

Com. Arr.—Committee of Arrangements.

Comdg.—Commanding.

Comm.—Commentary.

Comp.—Compare; Compound.