You're probably wondering how they work. A receiver is placed in the keyboard port, and your keyboard transmits signals directly to your computer. An infra-red wireless keyboard require that you have a somewhat clear line of sight between the keyboard and computer, you can move the keyboard a couple of feet away. Your keyboard will also need to have batteries. Wireless keyboards are pricier than standard keyboards, but prove to be a nice tool, especially if you don't like having to sit too close to a monitor.
Most people are familiar with the standard keyboard layout.
If your use of a keyboard is limited and you don't need to type much, a standard keyboard will work just fine. However, if you type quite often and feel pain in your wrists, you might need to consider getting a specially designed keyboard to help ease tension and stress from hands, forearms and wrists. The most common of these keyboards is the Split Design, where it seems as if the keyboard was cracked in half, with elevations on both sides of the keyboard. Some keyboards are also built with a built-in mouse, and special designs may also be found for children. Some keyboards are made to work only with PCs or MACs, while others are designed to work with any computer.