Back is the keyboard function of a laptop for many years. In addition to looking for cool, they use the main features that make it easier to work on the computer, both in the room's brightness. The bulbs do a good job in the light, but in the dim light or darkness they are illuminated by the keys that can make you can do it overnight. Today, on the back of the keyboard can be used as a computer and other computer tools, and if you find yourself working at night, it may be worthwhile to search. If you have, there are some things you need to know in order to make the best purchase.