1. Keyboard
1.1. Most Desktop Computer keyboard have
1.1.1. Between 101 and 105 keys
1.1.2. A numeric keypad on the right side the keyboard
1.1.3. Function keys
1.1.4. WINDOWS key
1.1.5. Application key
1.1.6. Toggle keys
1.2. Type
1.2.1. Wired Keyboard
1.2.2. Wireless Keyboard
2. Mouse
2.1. Type
2.1.1. Wired Mouse
2.1.2. Wireless Mouse
3. Game Controllers
3.1. Gamepads
3.2. Joysticks and Wheels
3.3. Light guns
3.4. Dance pads
3.5. Motion-sensing controllers
4. Digital Camaras
4.1. Type
4.1.1. Field cameras
4.1.2. Point‐and‐shoot camera
4.1.3. Studio cameras
4.2. Resolution
4.2.1. Resolution is the number of horizontal and vertical pictures in a display device
4.2.2. A pixel is the smallest element in an electronic display
4.3. Number of bits stored in each pixel
4.3.1. Each pixel consists of one or more bits of data
4.3.2. The more bits used to represent a pixel, the more colors and shades of gray that can be represented
5. Voice Input
5.1. Voice input
5.1.1. the process of entering input by speaking into a microphone
5.2. Voice recognition
5.2.1. the computer’s capability of distinguishing spoken words
5.3. Audio input
5.3.1. Speech
5.3.2. Music
5.3.3. Sound Effects