Whether you are targeting Mac OS X or iPhone, at some point your Cocoa application may be necessary to hold the data. Or, you can save time and energy by taking advantage of the Apple Core Data APIs instead. Core Data allows you to work with graphic objects and to survive the data-but there are many pitfalls and issues that must be considered. You will work with the Core data on both desktop and iPhone. At the end of Core Data, you will have the features to build complete applications, gain a complete understanding of Core Data, and learn how to integrate your application into OS X. As an added bonus, you'll see a lot of recipes that are useful in unusual situations, or even in places where you would not think to use the Core Data API previously.