From the wikipedia page relating to USB (universal serial bus):
http://en.wikipedia.org/wiki/Usb
under the history heading:
"The original USB 1.0 specification, which was introduced in January 1996,
had a data transfer rate of 1.5 Mbit/s.[5] The first widely used version of
USB was 1.1, which was released in September 1998. It allowed for a 12
Mbit/s data rate for higher-speed devices such as disk drives, and a lower
1.5 Mbit/s rate for low bandwidth devices such as joysticks.[6]
The USB 2.0 specification was released in April 2000 and was standardized by
the USB-IF at the end of 2001. Hewlett-Packard, Intel, Lucent Technologies
(now Alcatel-Lucent), NEC and Philips jointly led the initiative to develop
a higher data transfer rate, with the resulting specification achieving 480
Mbit/s, a fortyfold increase over the original USB 1.1 specification.
The USB 3.0 specification was published on 12 November 2008. Its main goals
were to increase the data transfer rate (up to 5Gbps), to decrease power
consumption, to increase power output, and to be backwards-compatible with
USB 2.0.[7] USB 3.0 includes a new, higher speed bus called SuperSpeed in
parallel with the USB 2.0 bus.[8] For this reason, the new version is also
called SuperSpeed.[9] The first USB 3.0 equipped devices were presented in
January 2010.[9]"
Jacob Kruger
Blind Biker
Skype: BlindZA
'...fate had broken his body, but not his spirit...'
----- Original Message -----
From: "Matthew C" <[email protected]>
To: <[email protected]>
Sent: Wednesday, March 30, 2011 5:10 PM
Subject: Re: [Blind-Computing] USB 2 and 3 what are they?
I believe it has something to do with the speed of transmition of data. 2.0
would be slower than say 3.0.
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Niamh
Sent: Wednesday, March 30, 2011 9:14 AM
To: [email protected]
Subject: [Blind-Computing] USB 2 and 3 what are they?
Sorry to be useless here, but people keep throwing these things at me at
work, and I haven't a clue what they are talking about.
Because we are security conscious we have to back up certain files to
off-line hard drives.
Now people are talking about USB 2 and 3, what does this mean?
Niamh
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