What accessibility features does Windows offer?

Many feature it offers. Rambabu explains it nicely. Go through the link.

Windows offers several programs and settings that can make the computer easier and more comfortable to use. Additional assistive technology products can be added to your computer if you need other accessibility features. More information

http://windows.microsoft.com/en-US/windows7/What-accessibility-features-does-Windows-offer

many features

Window offer many accessible feature as compared to other operating system.