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The biggest difference between a desktop computer and the laptop is no mouse. Laptops are designed with two types of replacements – the touchpad or the track point mouse. The touchpad is an area where the finger can move around to guide the pointer. The track point mouse looks like a mini red clown nose shoved in the middle of the keyboard. Like the touchpad the user can use their finger to work the pointer. If you know you'd miss the mouse too much make sure the laptop you buy has a USB port to accommodate your familiar, little clicking creature.