Mac OS X Reference Library. Why Objective-C?
Historical note: As a language, Objective-C has a long history. It was created at the Stepstone company in the early 1980s by Brad Cox and Tom Love. It was licensed by NeXT Computer Inc. in the late 1980s to develop the NeXTStep frameworks that preceded Cocoa. NeXT extended the language in several ways, for example with the addition of protocols.
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