1. Value Objects
1.1. NSAffineTransform
1.2. NSCalendar
1.3. NSCache
1.4. NSData
1.4.1. NSMutableDate
1.4.1.1. NSPurgableData
1.5. NSDate
1.5.1. NSCalendarDate
1.6. NSDateComponents
1.7. NSDecimalNumberHandler
1.8. NSLocale
1.9. NSNull
1.10. NSTimeZone
1.11. NSValue
1.11.1. NSNumber
1.11.1.1. NSDecimalNumber
1.12. NSValueTransformer
2. XML
2.1. NSXMLNode
2.1.1. NSXMLDocument
2.1.2. NSXMLDTD
2.1.3. NSXMLDTDNode
2.1.4. NSXMLElement
2.2. NSXMLParser
3. Strings
3.1. NSAttributedString
3.1.1. NSMutableAttributedString
3.2. NSCharacterSet
3.2.1. NSMutableCharacterSet
3.3. NSString
3.3.1. NSMutableString
3.4. NSFormatter
3.4.1. NSDateFormatter
3.4.2. NSNumberFormatter
3.5. NSScanner
3.6. NSSortDescriptor
4. Collections
4.1. NSArray
4.1.1. NSMutableArray
4.2. NSDictionary
4.2.1. NSMutableDictionary
4.3. NSEnumerator
4.3.1. NSDirectoryEnumerator
4.4. NSHashTable
4.5. NSIndexPath
4.6. NSIndexSet
4.6.1. NSMutableIndexSet
4.7. NSMapTable
4.8. NSPointerArray
4.9. NSPointerFunstions
4.10. NSSet
4.10.1. NSMutableSet
4.10.1.1. NSCountedSet
5. Predicates
5.1. NSExpression
5.2. NSPredicate
5.2.1. NSComparisonPredicate
5.2.2. NSCompundPredicate
6. OS Services
6.1. NSError
6.2. NSHost
6.3. NSNetService
6.4. NSNetServiceBrowser
6.5. NSOrthography
6.6. NSProcessInfo
6.7. NSRunLoop
6.8. NSSpellServer
6.9. NSTextCheckingResult
6.10. NSTimer
6.11. NSUserDefaults
6.12. File System
6.12.1. NSBundle
6.12.2. NSFileHandle
6.12.3. NSFileManager
6.12.4. NSMetadataItem
6.12.5. NSMetadataQuery
6.12.6. NSMetadateQueryAttributeValueTuple
6.12.7. NSMetadataQueryResultGroup
6.12.8. NSStream
6.12.8.1. NSInputStream
6.12.8.2. NSOutputStream
6.13. URL
6.13.1. NSCachedURLResponse
6.13.2. NSHTTPCookie
6.13.3. NSHTTPCookieStorage
6.13.4. NSURL
6.13.5. NSURLAuthorizationChallenge
6.13.6. NSURLCache
6.13.7. NSURLConnection
6.13.8. NSURLCredential
6.13.9. NSURLCredentialStorage
6.13.10. NSURLDownload
6.13.11. NSURLProtectionSpace
6.13.12. NSURLProtocol
6.13.13. NSURLRequest
6.13.13.1. NSMutableURLRequest
6.13.14. NSURLResponse
6.13.14.1. NSHTTLURLResponse
6.14. Interprocess Communication
6.14.1. NSPipe
6.14.2. NSPort
6.14.2.1. NSMessagePort
6.14.2.2. NSSocketPort
6.14.3. NSPortMessage
6.14.4. NSPortNameServer
6.14.4.1. NSMachBootstrapServer
6.14.4.2. NSMessagePortNameServer
6.14.4.3. NSScoketPortNameServer
6.15. Locking/Threading
6.15.1. NSConditionalLock
6.15.2. NSDistributedLock
6.15.3. NSLock
6.15.4. NSOperation
6.15.4.1. NSBlockOperation
6.15.4.2. NSInvocationOperation
6.15.5. NSOperationQueue
6.15.6. NSRecursiveLock
6.15.7. NSTask
6.15.8. NSThread
7. Notifications
7.1. NSNotification
7.2. NSNotificationCenter
7.2.1. NSDistributedNotificationCenter
7.3. NSNotificationQueue
8. Archiving and Serialization
8.1. NSCoder
8.1.1. NSArchiver
8.1.2. NSKeyedArchiver
8.1.3. NSKeyedUnarchiver
8.1.4. NSPortCoder
8.1.5. NSUnarchiver
8.2. NSPropertyListSerialization
9. Objective-C Language Services
9.1. NSAssertionHandler
9.2. NSAutoreleasePool
9.3. NSClassDescription
9.4. NSException
9.5. NSCarbageCollector
9.6. NSInvocation
9.7. NSMethodSignature
9.8. NSUndoManager
10. Scripting
10.1. NSScriptClassDescription : NSClassDescription
10.2. NSAppleEventDescriptor
10.3. NSAppleEventManager
10.4. NSAppleScript
10.5. NSPositionalSpecifier
10.6. NSScriptCoercionHandler
10.7. NSScriptCommand
10.7.1. NSCloneCommand
10.7.2. NSCloseCommand
10.7.3. NSCountCommand
10.7.4. NSCreateCommand
10.7.5. NSDeleteCommand
10.7.6. NSExistsCommand
10.7.7. NSGetCommand
10.7.8. NSMoveCommand
10.7.9. NSQuitCommand
10.7.10. NSSetCommand
10.8. NSScriptCommandDescription
10.9. NSScriptExecutionContext
10.10. NSScriptObjectSpecifier
10.10.1. NSIndexSpecifier
10.10.2. NSMiddleSpecifier
10.10.3. NSNameSpecifier
10.10.4. NSPropertySpecifier
10.10.5. NSRandomSpecifier
10.10.6. NSRangeSpecifier
10.10.7. NSRelativeSpecifier
10.10.8. NSUniqueIDSpecifier
10.10.9. NSWhoseSpecifier