1.10.1. Fields1.10.2. Methods1.10.3. The Object Class1.10.3.1. Creating, copying, and freeing objects1.10.3.2. Identifying objects and classes1.10.3.3. Testing object type1.10.3.4. Testing inheritance and conformance1.10.3.5. Information about methods1.10.3.6. Sending messages1.10.3.7. Posing1.10.3.8. Enforcing intentions1.10.3.9. Error handling1.10.3.10. Archiving1.10.4. The NSObject Class1.10.4.1. Creating, copying, and freeing objects1.10.4.2. Identifying objects and classes1.10.4.3. Testing inheritance and conformance1.10.4.4. Information about methods1.10.4.5. Sending messages1.10.4.6. Posing1.10.4.7. Error handling1.10.4.8. Archiving1.10.4.9. Reference counting