A keyboard is a set of buttons that send coded signals to a computer, printer, or communications channel. Each button, or key, corresponds to one or more letters, numbers, symbols, or special commands.
When you press a key, the keyboard sends a code to the computer's CPU that corresponds to the character printed on the key. When the CPU receives the signal, it accepts it either as part of a command or as text input and later appears on your monitor screen.
The following are the normal layout of the computer keyboard:
Basically when you choose a keyboard, few things need to be aware:
- Keyboard buttons sensitivity
- Connection type
- Color and shape
- Warranty period
Computer Mouse (Mice)
Computer uses a mouse or other pointing device to follow the movement of your hand, and convert that motion into instructions.
The following are typically a normal mouse look like
How to choose a mouse? The differences among different models of mouse include:
- Price
- Connection type - PS/2, USB or wireless
- Sensitivity and performance
- Number of buttons
- Size, color and shape
- Warranty period
Types of Keyboard and Mouse
Generally, there are three types of keyboard or mouse available today:
- PS/2 - connect to the PS/2 port at the rear panel of the system unit
- USB - connect to the USB port at the rear or front/side panel of the system unit
- Wireless - without wire
