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NSBundle is a class in Foundation for the manipulation of bundles. Bundles are specialized directories that collect related resources for an application or framework (or even an ordinary file) and present them to a user as a single, opaque file. Common resources are images, NIB or GORM interface files, localizations, and executable binaries.

NSBundle is mostly used to find the executable code for a given bundle (and vice versa), to choose appropriate localizations, and to locate other resources in a bundle's directory. Currently GNUstep defines two methods in addition to those from OpenStep: bundleForLibrary and pathForLibraryResource. However, these two extensions are experimental and might change.

NSBundle inherits from NSObject and is declared in Foundation/NSBundle.h.