1. Input
1.1. used to interact with or send data to the computer
1.1.1. mouse
1.1.1.1. A computer mouse is a hand-held pointing device that detects two-dimensional motion relative to a surface.
1.1.2. keyboard
1.1.2.1. keyboards the most common and very popular input device which helps to input data to the computer. The layout of the keyboard is like that a traditional typewriter, although there are some additional keys provided for performing additional functions.
1.1.3. microphone
1.1.3.1. an instrument for converting sound waves into electrical energy variations which may then be amplified, transmitted, or recorded.
2. Storage
2.1. stores data processed by the computer.
2.1.1. A storage device is a piece of computer hardware used for saving, carrying and pulling out data. It can keep and retain information short-term or long-term. It can be a device inside or outside a computer or server. Other terms for storage device is storage medium or storage media.
2.1.1.1. hard drive
2.1.1.1.1. a high-capacity, self-contained storage device containing a read-write mechanism plus one or more hard disks, inside a sealed unit. Also called hard disk drive.
2.1.1.2. flash drive
2.1.1.2.1. a small electronic device containing flash memory that is used for storing data or transferring it to or from a computer, digital camera, etc.
2.1.1.3. DVD
2.1.1.3.1. a digital optical disc data storage format invented and developed in 1995 and released in late 1996. The medium can store any kind of digital data and was widely used for software and other computer files as well as video programs watched using DVD players.
3. Output
3.1. which provides output to the user from the computer
3.1.1. Visual Display Units
3.1.1.1. displays images generated by a computer or other electronic device.
3.1.1.1.1. printers
3.1.1.1.2. monitors
3.1.1.1.3. speaker