HP Compaq dc7700-Ultra-Slim-Desktop-PC - Manual (Page 18)

Recovery Partition
This is a hidden or secured partition on the system that, when preinstalled,
contains an image of all factory-installed software. This partition also
contains the Initial Recovery Point. The Recovery Partition is bootable and
is used to reinstall all software originally shipped on the hard drive.
Recovery Disc Set
This is a set of CDs or DVDs created from the system. It includes a
backup of the Microsoft Windows operating system and all applications,
drivers, and data that existed on the primary hard drive when the Initial
Recovery Point was created.