The Cobalt RaQ is a 1U rackmount server product line developed by Cobalt Networks, Inc. (later purchased by Sun Microsystems) with a custom Red Hat Linux operating system and its own GUI for server management. The original RaQ systems were equipped with MIPS RM5230 or RM5231 CPUs, but later models used AMD K6-2 chips and eventually Intel Pentium III CPUs for the final models.