The HP LaserJet M203/M206 (REST) Windows driver refers to a software package for the HP LaserJet M203 and HP LaserJet M206 series printers, specifically designed to work with Windows operating systems. The term "REST" in this context usually refers to a RESTful API integration or a firmware component related to network functionality, particularly for remotely managing or configuring the printer over a network (e.g., for managing network settings, status, or configuration via web interfaces). However, most end-users typically don't need to interact with the REST APIs directly for basic printing tasks.