The computer keyboard is not a one-size-fits-all piece of equipment. Using the wrong size may cause shoulder or wrist discomfort. Most people don’t know which style is right for them. Here are a few tips to help you choose:
The standard (flat) keyboard is the most common, but isn’t the best choice for the non-number cruncher. The number pad on the right increases the width of the keyboard and can strain the shoulder when reaching for the mouse.
To reduce risk, select a compact keyboard (without a number pad). Mousing closer to the body keeps you in a more neutral position. If the number pad is necessary, learn to mouse left-handed or purchase a stand-alone number pad and place it as close to you as possible
If you have broad shoulders, use a semi-split or full-split keyboard to maintain proper wrist posture when typing. Using a standard or compact keyboard may cause ulnar deviation (when the wrists bend outward) and strains the wrists when typing.
A full-split keyboard is also a good choice for the frequent traveler. It is more portable and easy to pack.