JAWS is a computer screen reader program for Microsoft Windows.
JAWS (Job Access With Speech) is a computer screen reader program made by freedoms cientific for Microsoft Windows that allows blind and visually impaired users to read the screen either with a text-to-speech output.
According to May 2012 survey by WebAIM, JAWS is the most popular screen reader worldwide with 49.1% of survey participants using it as a primary screen reader.
Website: JAWS download page