ST-V (Sega Titan Video game system) is an arcade system board released by Sega in 1994. Departing from their usual process of building custom arcade hardware, Sega's ST-V is essentially identical to the Sega Saturn home console system. The only differences are the sound hardware and the ST-V's greater amount of onboard VRAM. The ST-V could use either ROM cartridges or CD-ROMs to store games. Being derived from the Saturn hardware, the ST-V was presumably named after the moon Titan, a satellite of Saturn.