A computer is an electronic machine that takes data (input), processes it, and produces information (output).
It can perform millions of tasks quickly and accurately.

🖥️ Simple Definition:
“Computer is a device that stores, processes, and displays information.”

Uses of Computer

Computers are used in many fields, such as:

  • Education: Online classes, learning apps
  • Business: Billing, communication, data management
  • Healthcare: Patient records, diagnosis machines
  • Entertainment: Gaming, movies, music
  • Banking: Online transactions, account management

🖼️ Image Idea:
A collage image showing computer use in school, office, hospital, gaming, and bank.

Who Developed the Computer and When?

The first mechanical computer was invented by Charles Babbage in 1822.
He is known as the “Father of the Computer“.
Later, in the 1940s, the first modern electronic computer called ENIAC was developed by John Presper Eckert and John Mauchly. in 1822.

What is Input Device?

An Input Device is used to send data into the computer.

🔹 Examples:

  • Keyboard – Used for typing text and commands.​
  • Mouse – A pointing device for interacting with the graphical user interface.​
  • Scanner – Converts physical documents into digital format.​
  • Microphone – Captures audio input.​
  • Webcam – Captures video input.​
  • Touchpad – A touch-sensitive surface used to control the cursor.​
  • Joystick – Used for gaming or controlling 3D environments.​
  • Light Pen – A pointing device that allows users to draw directly on the screen.​
  • Digitizer – Converts analog signals into digital data.​

What is Output Device?

An Output Device shows the result after processing.

🔹 Examples:

  • Monitor – Displays visual output from the computer.​
  • Printer – Produces a hard copy of digital documents.
  • Speakers – Emit audio output.​
  • Headphones – Personal audio output device.​
  • Projector – Projects visual output onto a larger screen or surface.​
  • Plotter – Produces large-scale graphics or drawings.
  • Microfilm – Stores documents in a miniature format for archival purposes.

Conclusion

Computers have become a part of our daily life.
They help us work faster, stay connected, and make tasks easier through various input and output devices.