Computer Input Devices and Data Processing

Here are the study notes:

Input Devices

• Keyboard: an input device that allows users to type data into the computer
• Mouse: a pointing device that allows users to interact with the computer graphically
• Scanner: an input device that converts paper documents or images into digital data
• Barcode Reader: an input device that reads barcode data and transmits it to the computer
• Optical Mark Reader (OMR): an input device that reads marked data from forms and transmits it to the computer

Storage Devices

• Hard Disk: a non-volatile storage device that stores data permanently
• Floppy Disk: a portable storage device that stores data temporarily
• Compact Disk (CD): an optical storage device that stores data permanently
• Flash Drive: a portable storage device that stores data temporarily

Output Devices

• Monitor: an output device that displays text and images
• Printer: an output device that prints text and images on paper
• Speaker: an output device that produces sound

Computer System

• CPU (Central Processing Unit): the brain of the computer that executes instructions
• Motherboard: the main circuit board of the computer that connects all hardware components
• Power Supply: a component that provides power to the computer
• RAM (Random Access Memory): a volatile memory that stores data temporarily while the computer is running

Input/Output Operations

• Data Entry: the process of entering data into the computer using input devices
• Data Processing: the process of executing instructions by the CPU
• Data Storage: the process of storing data in storage devices
• Data Retrieval: the process of accessing stored data

Computer Peripherals

• Card Reader: a device that reads data from cards (e.g., credit cards)
• Magnetic Stripe Reader: a device that reads data from magnetic stripes on cards
• OMR (Optical Mark Reader): a device that reads marked data from forms

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