Basic Screen Reader Commands

Action JAWS (Windows) NVDA (Windows) Voice Over (OS X)
Next link, form control or widget Tab Tab Tab
Previous link, form control or widget Shift+Tab Shift+Tab Shift+Tab
Re-read current item Insert+Numpad 5 NVDA+Numpad 5 or NVDA+Shift+O Command+Option+Space
More information on item Insert+SHIFT+F1 and Insert+Control+Shift+F1 NVDA+D Control+Option+F4
List of Links Insert+F7 NVDA+F7 Command+Option+U, then left/right arrow to list of links
Detailed Keyboard Information JAWS Keyboard Documentation NVDA Documentation Voice Over Guide