USB

USB 0.7

Nov 1, 1994

Released in November 1994.
prerelease

USB 0.8

Dec 1, 1994

Released in December 1994
prerelease

USB 0.9

Apr 1, 1995

Released in April 1995
prerelease

USB 0.99

Aug 23, 1995

Released in August 1995
prerelease

USB 1.0 Release Candidate

Nov 1, 1995

Released in November 1995.

USB 1.x

Jan 1, 1996

specified data rates of 1.5 Mbit/s (Low-Bandwidth) and 12 Mbit/s (Full-Bandwidth)

USB 2.0

Apr 1, 2000

(now called "Hi-Speed"), adding higher maximum signaling rate of 480 Mbit/s (effective throughput up to 35 MB/s or 280 Mbit/s), in addition to the "USB 1.x Full Speed" signaling rate of 12 Mbit/s

USB 3.0

Nov 1, 2008

The standard defines a new SuperSpeed mode with a signaling speed of 5 Gbit/s and a usable data rate of up to 4 Gbit/s (500 MB/s)

USB 3.1

Jan 1, 2013

The USB 3.1 standard increases the signalling rate to 10 Gbit/s, double that of USB 3.0