CHAPTER 3: Setting Up and Getting Started14Sitting at your computer• Avoid bending, arching, or angling your wrists. Makesure that they are in a relaxed position when you type.• Do not slouch forward or lean far back. Sit with your backstraight so your knees, hips, and elbows form rightangles when you work.• Take breaks to stand and stretch your legs.• Avoid twisting your torso or neck.Avoiding discomfort and injury from repetitivestrain• Vary your activities to avoid excessive repetition.• Take breaks to change your position, stretch yourmuscles, and relieve your eyes.• Find ways to break up the work day, and schedule avariety of tasks.Preparing power connectionsProtecting from power source problemsDuring a power surge, the voltage level of electricity cominginto your computer can increase to far above normal levels andcause data loss or system damage. Protect your computer andperipheral devices by connecting them to a surge protector,which absorbs voltage surges and prevents them fromreaching your computer.An uninterruptible power supply (UPS) supplies battery powerto your computer during a power failure. Although you cannotrun your computer for an extended period of time with a UPS,a UPS lets you run your computer long enough to save yourwork and shut down your computer normally.WarningHigh voltages can enter your computer through both the power cord andthe modem connection. Protect your computer by using a surge protector. If youhave a telephone modem, use a surge protector that has a modem jack. If youhave a cable modem, use a surge protector that has an antenna/cable TV jack.During an electrical storm, unplug both the surge protector and the modem.
