The following is a list of assistive technologies that some people with disabilities use to browse the Web. Assistive technologies are products used by people with disabilities to help accomplish tasks that they cannot accomplish otherwise or could not do easily otherwise. Some assistive technologies rely on output of other user agents, such as graphical desktop browsers, text browsers, voice browsers, multimedia players, plug-ins. Applications that can be operated entirely from the standard keyboard , with no mouse movements required, support single-switch access or access via alternative keyboards. Braille and refreshable braille Braille is a technique involving six to eight dots that are raised in different patterns to represent letters and numbers so that they may be read by people who are blind using their fingertips.
Braille systems vary greatly around the world.
Dynamic or refreshable braille involves the use of a mechanical display where dots can be raised and lowered dynamically to allow any braille words to be displayed. Only letters and numbers can be represented in braille, although some braille printers have a utility that allows simple graphics to be drawn on a sheet using the raised dots at a resolution of approximately 11 dots per inch. Screen magnifier s Software used primarily by individuals with low vision that magnifies a portion of the screen for easier viewing. Note that at the same time screen magnifiers make presentations larger, they also reduce the area of the document that may be viewed. Software used by individuals who are blind or have learning disabilities that interprets what is displayed on a screen, and directs it either to speech synthesis, for audio output, or refreshable braille, for tactile output.