laptop

A laptop computer or notebook computer is a little mobile computer, typically weighing 3 to 12 pounds, although older laptops may weigh up more. Laptops typically run on a single main battery or from an external AC/DC adapter that charge the battery while it also supplies power to the computer itself, even in the event of a power failure. This very potent main battery should not be confused with the much smaller battery nearly all computer use to run the real-time clock and backup BIOS configuration into the CMOS memory when the computer is lacking power.

Laptops contain mechanism that are similar to their desktop counterpart and perform the same functions, but are miniaturized and optimized for mobile use and efficient power expenditure, although typically less controlling for the same price. Laptops usually have liquid crystal display and most of them use different memory module for their random access memory, for instance, SO-DIMM in lieu of the larger DIMMs. In calculation to a built-in keyboard, they may utilize a touchpad or a point stick for input, though an outside keyboard or mouse can usually be attached.