Notebooks feature built-in keyboards and trackpads or eraser-type pointing devices (or both). But you may be better off not using them. Why? Because, ergonomically speaking, they can be bad for you. Typing on a notebook for long periods of time can put your hands, arms, neck, and shoulders in awkward positions.
     "You can never get positioned properly when typing on a notebook," says Deborah Quilter, coauthor of The Repetitive Strain Injury Recovery Book (Walker and Company, 1998, 212/727-8300). "When you have the notebook in the proper position for your hands, you have to look down too far to see the screen and that strains your neck. If you have the notebook in the proper position for viewing the screen, you risk straining your arms and hands to reach the keyboard."
     Obviously, there will be times when you'll need to use your notebook's built-in input device, such as when you're checking email wirelessly. However, you should use computer mice and other input devices sparingly, as each can be used improperly and, over time, strain your hands and arms. Instead, rely on keyboard shortcuts whenever you can.
     Another important step toward reducing your risk for repetitive strain injury is to attach an external keyboard and mouse to your notebook, particularly for prolonged work sessions. External devices allow you to position the notebook properly for comfortable typing and screen viewing. All external input devices can lead to RSI if improperly used, but without a doubt, the worst offender is the mouse. The mouse strains the hand by forcing repetitive use of one digit, and they are awkward to hold. Some serious injuries can occur from mouse use.
     You can purchase small notebook mice these days that are easy to carry, and have you seen the foldable flexible keyboards, great for travelling, easy to pack - and they work!