USB is termed as universal serial bus. It is a device developed in the mid- 1990's that defines the cables, connectors and communications protocols used in a BUS( communication system that transfers data between computers). It is used in a BUS for connection, communication and power supply between computers and electronic devices.
USB was designed to standardize the connection of computer peripherals to personal computers, both to communicate and supply electric power. USB has effectively replaced a variety of earlier interfaces, such as serial and parallel ports, as well as separate power chargers for portable devices.

Version History

The USB standard evolved through several versions before its official release in 1996:

  • USB 0.7 – released in November 1994
  • USB 0.8 – released in December 1994
  • USB 0.9 – released in April 1995
  • USB 0.99 – released in August 1995
  • USB 1.0 Release Candidate – released in November 1995