& in names of corporations or companies. On Survey miscellaneous maps "and" is spelled out in railroad names.
B. t. u. for British thermal units.
bbl., bbls. for barrel, barrels.
bu. for bushel or bushels.
c. c. for cubic centimeter.
cm. for centimeter.
cwt. for hundredweight.
dwt. or pwt. for pennyweight
oz. for ounce or ounces.
etc. (not &c.) for et cetera.