Casing

Casing may refer to an enclosing shell, tube, or surrounding material. It may also refer to:


 * Cartridge (firearms), shell enclosing the explosive propellant in ammunition
 * Casing (borehole), metal tube used during the drilling of a well
 * Casing (molding), decorative molding surrounding door or window openings
 * Casing (sausage), thin covering holding the food contents of sausage
 * Casing (submarine), platform attached to the upper side of a submersible vehicle
 * Computer case, the enclosure that contains most of the components of a computer
 * Letter case, the distinction between upper and lowercase letters in typography
 * Surreptitious reconnaissance, especially to aid a robbery