Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Time Machine is a backup utility developed by Apple. It is included with Mac OS X and was introduced with the 10.5 "Leopard" release of Mac OS X. The software is designed to work with the Time Capsule as well as a number of external FireWire (IEEE 1394a/b) and USB hard drives.Time Machine, like many backup utilities, creates incremental backups of files that can be restored at a later date. It allows the user to restore the whole system, multiple files, or a single file. It works within iWork, iLife, and several other compatible programs, making it possible to restore individual objects (e.g.: photos, contacts, calendar events) without leaving the application.