The Data structures in Foundation Kit can only hold objects, not primitive types, so wrappers such as NSValue and NSNumber are used in those data structures.
National Science Foundation | Ford Foundation | Rockefeller Foundation | Drum kit | John Simon Guggenheim Memorial Foundation | Electronic Frontier Foundation | Kit Carson | drum kit | Bill & Melinda Gates Foundation | New York Foundation for the Arts | Mozilla Foundation | Guggenheim Foundation | Alexander von Humboldt Foundation | Andrew W. Mellon Foundation | Wikimedia Foundation | Apache Software Foundation | foundation | Software development kit | Make-A-Wish Foundation | John D. and Catherine T. MacArthur Foundation | Clinton Foundation | Open Software Foundation | Konex Foundation | Foundation series | Kit Bond | Cystic Fibrosis Foundation | Carnegie Foundation | Solomon R. Guggenheim Foundation | McKnight Foundation | Kit Chan |