Overview
This lecture introduces common computer input and output devices, describing their functions and categorizing them.
Input Devices
- A scanner is an input device that converts images, text, and handwriting into digital form.
- A video camera is an input device that captures video data and images.
- A microphone is an input device used to capture audio.
Output Devices
- A monitor is an output device that displays information visually.
- A printer is an output device that provides output as text, symbols, or images on paper.
- Headphones are output devices used for listening to music or audio.
- Speakers are output devices that produce sound.
Devices with Both Input and Output Functions
- The CPU (Central Processing Unit) processes instructions and can act as both input and output device within the computer's operations.
- Tablets and laptops can perform both input and output functions.
Storage and Other Devices
- A USB flash drive is a data storage device used to store and transfer files.
- A UPS (Uninterruptible Power Supply) provides backup power in case of power loss.
- A game device (game controller) is used to interact with games (input).
- An optical device can project images onto a large surface (output).
Key Terms & Definitions
- Input Device — hardware that sends data to a computer (e.g., scanner, microphone)
- Output Device — hardware that receives data from a computer and presents it (e.g., monitor, printer)
- CPU (Central Processing Unit) — the ‘brain’ of the computer that processes instructions
- USB Flash Drive — portable device for data storage and transfer
- UPS (Uninterruptible Power Supply) — device that keeps electronics running during power outages
Action Items / Next Steps
- Review examples of input and output devices.
- Prepare a list of devices from your home or school and classify them as input, output, or storage.