| 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 |
1.4.5