Input and Output Devices Overview

Input Devices

Allow users to enter data or instructions directly into a computer, essential for receiving commands and processing data.

Keyboards

Used for data input into applications software, typing commands, and essential for text input.

Numeric Keypads

Utilized in ATMs, mobile phones, and POS terminals for quick numerical data entry.

Mouse

Functions include software management, file handling, and cursor control.

Touchpad

Similar to a mouse for software control, offering a compact alternative for cursor navigation.

Tracker Ball

Alternative to a mouse, especially beneficial for users with RSI, commonly used in industrial control rooms.

Magnetic Stripe Readers

Found on credit/debit cards for secure data entry and access control.

Chip and PIN Reader

Secure payment method using cards with added PIN verification, enhancing security.

Radio Frequency Identification (RFID) Reader

Used for various applications like livestock tracking, retail, and library management, improving efficiency.

Optical Mark Reader/Recognition (OMR)

Employed in MCQs checking and voting papers reading, enhancing data processing speed and accuracy.

Optical Character Recognition/Reader

Enables processing of passports, automatic number plate recognition, and document digitization.

Output Devices

Produce processed data in a human-readable form, essential for displaying information.

Cathode Ray Tube (CRT) Monitors

Ideal for complex diagrams in Computer-aided design, used with light pens for precise work.

Liquid Crystal Display (LCD) Screens

Primary output device for modern computers and mobile phones, offering high-quality visual output.

Multimedia Projectors

Used for training presentations, advertising, and home cinema systems, enabling large audience viewing.

Laser Printers

Suitable for noise-sensitive environments and high-volume printing, providing fast and high-quality output.

Inkjet Printers

Ideal for low-output volumes and high-quality single-page printing, commonly used for documents and images.