USB is an acronym for Universal Serial Bus, a wired interface that allows multiple various devices to be connected to a computer using a common interface.
The certified USB logo
|Produced||Since May 1996|
|Superseded||Serial port, parallel port, game port, Apple Desktop Bus, PS/2 port, and FireWire (IEEE 1394)|
|Signal||5 V DC|
|Data signal||Packet data, defined by specifications|
Depending on mode|
Half-duplex (USB 1.x and USB 2.0):
1.5; 12; 480 Mbit/s
Full-duplex (USB 3.x and USB4):
5000; 10000; 20000; 40000 Mbit/s
|Standard USB-A plug (left) and USB-B plug (right)|
|Pin 1||VBUS (+5 V)|
Universal Serial Bus (USB) is an industry standard that establishes specifications for cables and connectors and protocols for connection, communication and power supply (interfacing) between computers, peripherals and other computers. A broad variety of USB hardware exists, including eleven different connectors, of which USB-C is the most recent.