The HP Photosmart 5520 Series is an all-in-one inkjet printer that can print, scan, and copy documents. The "rest" in your query likely refers to a generic name for a specific driver package that includes all the necessary files for various operating systems, but especially for Windows.

The Windows driver for the HP Photosmart 5520 series is a software package that allows your computer to communicate with and utilize the printer's features. This includes functions like printing, scanning, and accessing printer settings. Without the correct driver, your printer may not work properly or be recognized by your system.