PlayStation models - Wikipedia
The PS One (officially stylized as PS one and alternatively spelled PSOne and PSone) is a smaller, redesigned version of the original PlayStation platform. ( Dimensions are 38 mm × 193 mm × 144 mm versus 45 mm × 260 mm × 185 mm.) It was released on July 7, 2000, and went on to outsell all other consoles throughout the remainder of the year—including Sony's own …