Snow Leopard Makes Strides in Accessibility
From: Weekend Reading - 08/28/2009

Mac OS X 10.4 (Tiger) introduced a host of features that make using a Mac
easier for people with physical disabilities. Among its key improvements was
VoiceOver, a screen reader that narrated whatever was on the Mac's display.
Leopard improved on those features, adding a more human-sounding computer
voice (Alex) and offering more ways to interact with the Mac (including
support for USB Braille displays and number-pad input). Snow Leopard
continues those efforts to make OS X more accessible.  

Read the entire article at:
http://www.pcworld.com/businesscenter/article/170935/snow_leopard_makes_strides_in_accessibility.html