Netbooks are small portable computing devices, similar to a notebook, and are great for surfing the Web and checking e-mail. What differentiates a netbook from a notebook is its physical size and computing power. A netbook typically has a small display, ranging from 7 to 10 inches. They weigh about 1Kg, and have a keyboard that is reduced in size from 75 to 80 percent when compared to a standard keyboard. Netbooks have build-in Wi-Fi, Ethernet, USB ports and slots for flash memory cards. To keep the devices small and compact, netbooks do not have a CD or DVD drive, and use solid-state disks (SSD) or notebppk hard drives for storage. Netbooks commonly run Linux or basic Windows operating systems.