How do I restore lost keyboard commands to my computer keyboard?

I have lost the basic keyboard commands on my computer keyboard: Search; Internet; Info; E-mail; Eject 1; Eject 2, and media controls, etc. How do I restore the features?
Asked Dec 29, 2012
That is very good question here in you can see all keyboard shortcuts,
popup menu, hotkeys, button icons and more keyboard tricks!
Answered Oct 14, 2016

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