1. Speakers , Headphones , and Earphones
1.1. An audio output device is a component of a computer
2. Flat-Panel Displays
2.1. LCD Monitors and Screen
2.1.1. LCD monitor is a desktop monitor that uses a liquid crystal display
2.2. Plasma Monitors
2.2.1. Plasma monitors offer larger screen sizes and richer colors than LCD monitors
2.3. Television
2.3.1. Home users sometimes use their television as a display device
3. CRT Monitors
3.1. A CRT monitor is a desktop moniter that contains a cathode-ray tube
3.2. Quality of CRT Monitors
3.2.1. Most CRT monitors support a variety of screen resolutions
3.2.2. Small dot pitch or pixel pitch is easier to read
3.2.3. Electron beams inside a CRT monitors
4. What is output
4.1. Output is data that has been processed into a useful form.
5. Printers
5.1. Nonimpact Printer
5.1.1. A nonimpact printer forms characters and graphics on paper without actually striking the paper
5.2. Ink-Jet Printer
5.2.1. An ink-jet printer forms characters and graphics by spraying tiny drops of liquid ink onto paper
5.3. Photo Printer
5.3.1. A photo printer is a color printer that produces photo
5.4. Laser Printers
5.4.1. A laser printer is a high-speed,high quality nonimpact printer
5.5. Thermal Printers
5.5.1. A thermal printer generates images by pushing electrically heated pins against heat-sensitive paper
5.6. Mobile Printers
5.6.1. A mobile printer is small, lightweight, battery-powered printer that allows a mobile user to print from a notebook computer,Tablet PC,PDA,or smart phone
5.7. Label and Postage Printers
5.7.1. A label and postage printer is small printer that prints on an adhesive
5.8. Plotters and Large-Format Printers
5.9. Impact Printers
5.9.1. An Impact printer forms characters and graphics on a paper by striking a mechanism against an inked ribbon that physically contacts the paper
5.10. Dot-Matrix Printers
5.10.1. Dot-Matrix Printer is an impact printer