All-in-One PCs (AIO PCs) are streamlined desktop computers that integrate all of the components of a traditional desktop computer, except for the keyboard and mouse, into one single unit.
There are two basic flavors of chassis designs–desktop models and tower models–but there are many variations on these two basic types. Then come the portable computers that are computers small enough to carry. Portable computers include notebook and subnotebook computers, hand-held computers, palmtops, and PDAs.