The PS one (also PSone, PSOne, or PS1), launched in 2000, is Sony's smaller (and redesigned) version of its PlayStation video game console. The PS one is considerably smaller than the original PlayStation (dimensions being 38 mm × 193 mm × 144 mm versus 45 mm × 260 mm × 185 mm). It was released on July 7, 2000,^[16] and went on to outsell all other consoles—including Sony's own brand-new PlayStation 2—throughout the remainder of the year.^[17] Sony also released a small LCD screen and an adaptor to power the unit for use in cars. The PS one is fully compatible with all PlayStation software. The PlayStation is now officially abbreviated as the "PS1" or "PS one." There were three differences between the "PS one" and the original, the first one being cosmetic change to the console, the second one was the home menu's Graphical User Interface, and the third being added protection against the modchip by changing the internal layout and making previous-generation modchip devices unusable. The PS one also lacks the original PlayStation's parallel and serial ports. The serial port allowed multiple consoles to be connected for multiplayer or for connecting a console to debugging software.