NSArray | NSArray class operates array of objects |
NSCharacterSet | NSCharacterSet class operates the set of special characters of unicode |
NSData | NSData class operates the information for command line options |
NSFileHandle | NSFileHandle operates data file |
NSFileManager | NSFileManager class controls files and directories |
NSMutableArray | NSMutableArray class operates array of objects |
NSMutableString | Unicode string operation class |
NSObject | NSObject class |
NSRange | Structure for data which has range information |
NSString | Unicode string operation class |