Case or CASE may refer to: Instances. Instantiation (disambiguation), a realization of a concept, theme, or design. Special case, an instance that differs in a certain way from others of the type. Containers. Case (goods), a package of related merchandise. Cartridge case or casing, a firearm cartridge component. Bookcase, a piece of furniture used to store books. Briefcase or attaché case, a narrow box to carry paperwork. Computer case, the enclosure for a PC's main components. Keep case, DVD or CD packaging. Pencil case. Phone case, protective or vanity accessory for mobile phones.
https://en.wikipedia.org/wiki/Case