Ozbuy.com is an Internet driven store, which specialises in hardware components such as Printers, Hard drives, Ram, Zip drivers, etc. It also sells things such as mobile phones and other accessories. This site has a lot of different brands of input devices and the prices and specifications of each so comparisons can be done.
This website describes different designs of input
devices and mentions problems such as how blind people would use a keyboard.
Basically emphasis the importance of input device design,
This web site is basically lecture notes about input
devices which is good because it gives a more in-depth explanation of input
devices and how to pick the right device to suit the right task. And how certain
users may need to use special devices because of a disability for example. Such
as a special keyboard for blind people.