On-Screen Keyboard:
. "What is an on-screen keyboard?." axistive. N.p., 07/25/2007. Web. 1 Jun 2012. <http://www.axistive.com/what-is-an-on-screen-keyboard.html>.
. "WiViK® on-screen keyboard (virtual keyboard) software."wiviki.com. N.p., 03/20/2003. Web. 1 Jun 2012. <http://www.wivik.com/>.


Talking and large- print word processors:
Images
Screen enlargers or screen magnifiers:


Sip and Puff :