1. Input Devices
1.1. Keyboard
1.1.1. Like a typewriter allows you to input letter into you computer
1.2. Mouse
1.2.1. Utilize it to give commands, make selections
1.3. Trackball
1.3.1. Like a mouse but you use the ball to position your pointer to give commands and make selections
1.4. Trackpad
1.4.1. Like a mouse and trackball only you utilize you finger to give commands and make selections
1.5. Scanner
1.5.1. Utilizing OCR you can scan documents an into your computer
1.6. Cameras
1.6.1. Input photographs into your computer for storage or use in documents.
1.7. Microphone
1.7.1. Use for word processing voice recognition and dictating so that you do not have to type, can also be used for the input of music or your voice for recordings.
2. Output Devices
2.1. Monitor
2.1.1. Several differ types but the most common today are flatscreen and touchscreen monitors
2.2. Printer
2.2.1. Printers come in all shape and sizes, it can be a straight forward printer or it can be many device all in one such as a multifuction printer
2.3. Plotter
2.3.1. Plotters are like a printer but are ofter used in the business environment for making such documents as blueprints