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 See also Cas (disambiguation), French for "case" Case (disambiguation) Casting (disambiguation) Cover (disambiguation) Sleeve (disambiguation) KaSing, or Raymond Tsang, (born 1995) Hong Kong League of Legends player