Backup (software)
Backup is a backup utility made by Apple for Mac OS X. It is available through Apple's MobileMe (formerly .Mac) collection of Internet services. Backup can be used in connection with either a user's online MobileMe iDisk or the Macintosh's CD-RW or DVD-R drive to make safe, archival copies of critical files and folders.
Read more about Backup (software): Time Machine, MobileMe