The HP DeskJet 2600 Series (REST) Windows driver is likely a software package used to manage and facilitate communication between your HP DeskJet 2600 Series printer and your Windows computer. This driver allows your operating system to interact with the printer, enabling printing, scanning, and other functionality specific to the DeskJet 2600 Series.
REST in this context could refer to Representational State Transfer (a web service protocol), which is sometimes used in newer printer models for network communication, cloud printing, or remote management features. However, for most users, the key aspect to focus on is installing the correct driver so that the printer functions properly on your system.