The laptop is a portable personal computer. It's small enough to carry around, and it has a screen, keyboard and pointing device (usually a touchpad or track pad) built in. You can also buy external keyboards and external monitors for your laptop.
Laptops are less expensive than desktop computers because they use less power and don't require a lot of space for their components. Laptops also don't have nearly as many parts that can break over time when compared to desktops.
You can use a laptop as your primary computer or as a secondary computer if you have other devices such as tablets or smartphones that you use more often than your laptop.
