RSX

RSX may refer to:

Computing

 * RSX, a RISC CPU from Encore Computer
 * RSX-11, an operating system family developed by Digital Equipment Corporation
 * RSX 'Reality Synthesizer', a graphics chip for the PS3
 * Resident System Extension, part of the CP/M Plus operating system

Other uses

 * Acura RSX, an automobile
 * Rhein-Sieg-Express, a German regional train service
 * RS:X (sailboard)
 * RSX Energy, a Canadian oil and gas company
 * Label for an X-ray observation made by ROSAT