12. Thread entry routine § Creating an Autorelease Pool § Setting Up an Exception Handler § Setting Up a Run Loop

13. Runloop

14. Input sources § Port-Based Sources § Custom Input Sources § Cocoa Perform Selector Sources

22. Operation objects § Operation object is a wrapper for a task that would normally be executed on a secondary thread. § This wrapper hides the thread management aspects of performing the task, leaving you free to focus on the task itself.

23. Dispatch queues § With GCD, you define the task you want to perform and add it to a work queue, which handles the scheduling of your task on an appropriate thread. § Work queues take into account the number of available cores and the current load to execute your tasks more efficiently than you could do yourself using threads.