C. or Cent.—Hundred.
Cf. or cf. (L. confer).—Compare.
Chem.—Chemistry.
Cin.—Cincinnati.
C.J.—Chief Justice.
C.M.—Common meter.
C.M.G.—Companion of the Order of St. Michael and St. George.
C.N.R.(O.)—Canadian Northern Railway (of Ontario).
Co.—Company. County.
c/o.—In care of.