Sources

__On-Screen Keyboard: __ . "WiViK® on-screen keyboard (virtual keyboard) software." // wiviki.com //. N.p., 03/20/2003. Web. 1 Jun 2012. .
 * . "What is an on-screen keyboard?." axistive. N.p., 07/25/2007. Web. 1 Jun 2012. . **

__** Talking and large- print word processors: **__ __**Images**__ > > __Screen enlargers or screen magnifiers: __ 
 * **1 Jun 2012. .**
 * **Link to website to buy the device .. []**
 * **. "AbleData:Products." voice output word processor program. N.p., n.d. Web. 1 Jun 2012. .**
 * []
 * []
 * []
 * "Computer Screen Magnifiers." //Computer Screen Magnifiers //.
 * Learning, Sight & Sound Products. Web. 01 June 2012.
 * .

__** Sip and Puff : **__

 * "WebAIM:Motor Disabilities." //Motor Disabilities//. 1999, 31May,2012. Web. 1 Jun 2012. .