My youngest brother lost his right arm at the age of 4 in a piece of farm equipment back in 1968....
Today, he is the IT guy for our county government's computer system, and the fastest one-handed typist you've ever seen! He's worked with computers most of his life, and most of his jobs involve them, from writing programs to operating a CNC lathe in a machine shop....
In addition, he films and edits the local high school's sporting events and burns them onto DVD's for the booster club to sell for fund raising projects, and works on his "kit car"....
He can even tie his own shoes, but is not too proud or afraid to ask for help if he needs it....