For Windows XP:

Display the Start menu. CTRL+ESC

Display the corresponding menu. ALT+Underlined letter in a menu name
Carry out the corresponding command. Underlined letter in a command name on an open menu

Activate the menu bar in the active program. F10

Open the next menu to the right, or open a submenu. RIGHT ARROW

Open the next menu to the left, or close a submenu. LEFT ARROW

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A.Rajesh Khanna