Desktop PCs today can be custom-made for an assortment of uses. You can buy a media center PC that is exclusively built to watch and edit movies, rip music, etc. Gaming enthusiasts can get a desktop computer that enhances their game play and provides the highest quality graphics and sound.
A laptop computer is much smaller than a desktop. Laptops usually run on a single main battery or from an external AC/DC adapter which can charge the battery while also supplying power to the computer itself. Many computers also have a 3 volt cell to run the clock and other processes in the event of a power failure.
As personal computers, laptops are capable of the same tasks as a desktop computer, although they are typically less powerful for the same price. They contain components that are similar to their desktop counterparts and perform the same functions, but are miniaturized and optimized for mobile use and efficient power consumption. Laptops usually have liquid crystal displays and most of them use different memory modules for their random access memory (RAM), for instance, SO-DIMM in lieu of the larger DIMMs. In addition to a built-in keyboard, they may utilize a touchpad (also known as a trackpad) or a pointing stick for input, though an external keyboard or mouse can usually be attached.
Much better to use Lap top, easy to carry and as a student we can use this laptop to make our work file. The advantages of this two is different. Laptop is most advantage to use than desk top pc. The disadvantage of this two if the desk top has a damage it easy to repair but the laptop mosly the cable or circuit are hard to find. The small machine of laptop are very expensive.