"Universal Serial Bus (USB
) is a specification[1] to establish communication between devices and a host controller (usually personal computers), developed and invented by Ajay Bhatt while working for Intel. USB is intended to replace many varieties of serial and parallel ports. USB can connect computer peripherals such as mice
, keyboards
, digital cameras
, printers
, personal media players
, flash drives
, and external hard drives
. For many of those devices, USB has become the standard connection method. USB was designed for personal computers
, but it has become commonplace on other devices such as smartphones
, PDAs
, video game consoles
, and as a power cord
. As of 2008, there are about 2 billion USB devices sold per year, and approximately 6 billion total sold to date." http://en.wikipedia.org/wiki/Universal_Serial_Bus
