Microsoft Windows

Keyboard
StickyKeys enables you to press the CTRL, ALT, and SHIFT keys and have them remain active until the next time you press a key other than CTRL, ALT, or SHIFT. This is useful for people who have difficulty pressing two keys simultaneously.

FilterKeys instructs your keyboard to ignore brief or repeated keystrokes. You can also adjust the keyboard repeat rate, which is the rate at which a key repeats when you hold it down.

ToggleKeys instructs your computer to play a high sound when the CAPS LOCK, SCROLL LOCK, or NUM LOCK key is switched on and a low sound when any of those keys are switched off.

The Sound Page tab
SoundSentry instructs your computer to flash part of your screen every time the system's built-in speaker plays a sound. You can specify which part of the screen flashes by clicking Settings.

ShowSounds instructs programs that usually convey information only by sound also to provide all information visually, such as by displaying text captions or informative icons.

Display
High Contrast Instructs programs to change the color scheme to the one specified in the Settings dialog box instead of using program-specific colors, and to increase legibility whenever possible.
 

Mouse
MouseKeys enables you to use the numeric keypad to move the mouse pointer and to click, double-click, and drag.

General
Automatic Reset Instructs your computer to turn off StickyKeys, SoundSentry, MouseKeys, FilterKeys, ToggleKeys, and High Contrast after your computer has been idle for a specified period of time. The SerialKey devices feature is not turned off.
This setting is useful if more than one person uses the same computer.

Notification
Displays a confirmation message every time you use a shortcut key to turn an accessibility feature on or off. This is useful for alerting people who might turn on a feature accidentally.
 

SerialKey Advices support so you can attach an alternate input device (also called an augmentative communication device) to your computer's serial port. This feature is designed for people who are unable to use the computer's standard keyboard and mouse.