Unlike desktops, laptop computers can be difficult and expensive to upgrade. When you purchase a laptop, consider that any internal features such as CD-ROM or hard drive may be difficult to replace. Laptops can be upgraded externally with USB, FireWire, and PC Card slot. Because each of these methods is external, however your laptop will become less portable if you need to carry around external devices.

A Tablet PC is a custom laptop that allows you to write on screen to save notes and work with programs. Tablet PCs are typically smaller than laptops and feature a specialized processor that is extremely battery-efficient. Some Tablet PCs do not have a built-in keyboard, but can connect to an external keyboard. These are ideal for people who use Tablet PC mode most of time and need to use keyboard occasionally.

If you have little need for a portable computer, a "desktop replacement" may be for you. A desktop replacement looks like a laptop, but is much larger and priced competitively with desktops. Whatever kind of laptop fits your lifestyle, gone are days when laptops were expensive and less capable than traditional desktop computers.