NeXTSTEP.Objective-C doesn't have namespaces (like C), so people use two-letter prefixes on their types to prevent name clashes. The NS prefix is used by Apple's Foundation and AppKit frameworks, that originated from NeXTSTEP, hence NS.
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Objective-C doesn't have namespaces (like C), so people use two-letter prefixes on their types to prevent name clashes. The NS prefix is used by Apple's Foundation and AppKit frameworks, that originated from NeXTSTEP, hence NS.