Your computer can read aloud text that is printed on the screen.Windows Narrator is a program that comes installed with Windows that reads what is displayed on your screen; the contents of the active window, menu options, or the text you have typed.To activate Narrator:Press the Windows key on your keyboard.1.Type "Narrator" and hit Enter.2.A new window will appear with Narrator options as you begin to hear what is written on the screen.Apple's VoiceOver is a built in screen reader that lets you interact with your Mac, based on spoken descriptions.To start VoiceOverPress Command + F5.Your computer should begin to speak the content of your screen.There are many text to speech add-ons for your web browser.•Firefox : Many add-ons are available for text to speech . •Chrome : A wide variety of extensions for browser accessibility . •Safari : For Mac OS only, select text and then right click and select Speech > Start Speaking. •Opera : has discontinued text-to-speech. •Internet Explorer : relies on Windows Narrator for text to speech. There are numerous screen readers available to purchase or for free download. Wikipedia's list of screen readers can help you select an appropriate one for you and your operating system.