Internet

Introduction

Internet is the study of basic structure, operations and functions of computer systems. A computer is an electronic machine that processes data, performs calculations, and solves problems at high speed and accuracy.

Definition of Computer

Computer is an electronic device that accepts data (input), processes it according to instructions (process), and gives the result (output).
IPO Cycle: Input → Processing → Output

Main Components of Computer

Input Unit (e.g. keyboard, mouse, scanner)
Output Unit (e.g. monitor, printer, speaker)
CPU (Central Processing Unit)
Memory Unit (RAM and ROM)

Basic Terms

Hardware: Physical parts - monitor, keyboard, CPU, printer
Software: Programs and applications - Windows, MS Word, Photoshop
Data: Raw facts and figures that are processed by the computer
Information: Processed data which has meaning and is useful

Uses of Computers

Education
Business
Banking
Health Care
Designing & Animation
Research

Generations of Computers

Computers have evolved in generations:
1st Generation: Vacuum Tubes
2nd Generation: Transistors
3rd Generation: Integrated Circuits
4th Generation: Microprocessors
5th Generation: Artificial Intelligence (AI)

Important Points

Computers are reliable, fast and accurate.
They do not have intelligence or emotions, only process instructions.
Require electricity, input and instructions to operate.