1 [{Package} [Glossary Entry] Packages are program units that allow the specification of groups of logically related entities. Typically, a package contains the declaration of a type (often a private type or private extension) along with the declarations of primitive subprograms of the type, which can be called from outside the package, while their inner workings remain hidden from outside users. {information hiding: See package} {encapsulation: See package} {module: See package} {class: See also package} ]