What is a universal serial bus?

Universal Serial Bus (USB) is a serial bus standard to interface devices. It was designed for computers such as PCs and the Apple Macintosh, but its popularity has prompted it to also become commonplace on video game consoles, PDAs, portable dvd and media players, cellphones; and even devices such as televisions, home stereo equipment (e.g., mp3 players), car stereos and portable memory devices.