Missing Letters

My Dell Netbook has been the main tool of my trade for about three or four years. It holds volumes of written material. When I lift the screen to open it and look at the keyboard I realize just how much I have used this incredible little piece of technology when I gaze at the keyboard with a umber of letters worn right off the keys. Now, that's a lot of typing, to have worn the letters off the various keys like that! I love it and still use it, despite having the new HP Stream notebook now. My little Dell is the workhorse and has never failed me.