Timeline of USB technology

USB 0.8

Dec 1, 1994

USB 0.9

Apr 1, 1995

USB 0.99

Aug 17, 1995

USB 1.0

Jan 1, 1996

Low Speed (1.5 Mbit/s), Full Speed (12 Mbit/s)

USB 1.1

Aug 1, 1998

USB 2.0

Apr 1, 2000

High Speed (480 Mbit/s)

USB 3.0

Nov 30, 2008

SuperSpeed (5 Gbit/s)
Is backwards compatible with USB 2.0

USB 3.1

Jul 31, 2013

SuperSpeed+ (10 Gbit/s)