ICT Basics: Information and Communication Technology

1. Introduction to ICT

What is ICT?

ICT stands for Information and Communication Technology.

It refers to all technologies used to create, store, process, share, and communicate information.

In simple words, whenever we use a computer, smartphone, internet, email, or video call to exchange information, we are using ICT.

Examples of ICT

• Computers
• Smartphones
• Tablets
• Internet
• Email
• Video conferencing
• Social media
• Digital cameras
• Smart TVs

2. Importance of ICT

ICT has become an important part of daily life.

In Education

• Online classes
• Digital notes
• Educational videos
• Online examinations

In Business

• Record keeping
• Online banking
• Digital payments
• Customer communication

In Healthcare

• Online appointment booking
• Digital medical records
• Telemedicine

In Communication

• Email
• Video calls
• Instant messaging

In Entertainment

• Movies
• Music streaming
• Online gaming

3. Components of ICT

ICT mainly consists of four parts:

A. Hardware

Physical parts of a computer that can be touched.

Examples: Keyboard, mouse, monitor, CPU, printer, and scanner.

B. Software

Programs and applications that tell the computer what to do.

Examples: Windows, LibreOffice, MS Word, Paint, and Chrome Browser.

Types of Software

System software: Controls the computer system. Examples include Windows, Linux, and Android.

Application software: Used to perform specific tasks. Examples include word processors, spreadsheets, and presentation software.

C. Data

Data means raw facts and figures, such as student marks, names, mobile numbers, and attendance records.

When data is processed and becomes meaningful, it is called information.

Example: Data: 85, 90, 88. Information: Average score = 87.6.

D. Communication Technology

Technologies used to transfer information from one place to another.

Examples: Internet, Wi-Fi, Bluetooth, and mobile networks.

4. Computer System

A computer system is an electronic machine that accepts data, processes it, stores it, and produces meaningful information.

Functions of a Computer

• Input: Receiving data. Example: Typing using a keyboard.
• Processing: Working on the data. Example: Calculating marks.
• Storage: Saving data. Example: Saving a file.
• Output: Showing results. Example: Displaying marks on a monitor.

5. Characteristics of a Computer

• Speed: Performs millions of calculations quickly.
• Accuracy: Produces correct results if instructions are correct.
• Storage capacity: Stores large amounts of data.
• Diligence: Does not get tired.
• Reliability: Works consistently.
• Versatility: Performs different types of tasks.

6. Input Devices

Input devices are used to enter data into a computer.

• Keyboard: Used for typing text and numbers.
• Mouse: Used for pointing, clicking, and selecting.
• Scanner: Converts paper documents into digital form.
• Microphone: Used to input sound.
• Webcam: Used to capture images and videos.
• Touchscreen: Allows users to interact by touching the screen.

7. Output Devices

Output devices are used to display processed information.

• Monitor: Displays text, images, and videos.
• Printer: Produces hard copies. Common types include inkjet and laser printers.
• Speakers: Produce sound output.
• Projector: Displays content on a large screen.

8. Storage Devices

Storage devices store data and information.

Primary Storage

Temporary storage used while working. Examples include RAM and cache memory.

• Fast
• Temporary
• Data is lost when the power is off

Secondary Storage

Permanent storage. Examples include hard disks, SSDs, pen drives, memory cards, and DVDs.

• Permanent
• Large storage capacity

9. Memory Units

10. Operating System

An operating system (OS) is software that manages computer resources and acts as a bridge between the user and computer.

Functions

• Manages files
• Controls hardware
• Runs applications
• Provides a user interface

Examples: Windows, Linux, Android, and macOS.

11. Internet

The internet is a worldwide network connecting millions of computers.

Uses

• Communication
• Education
• Banking
• Shopping
• Entertainment
• Research

12. Web Browser

A web browser is software used to access websites.

Examples: Google Chrome, Mozilla Firefox, Microsoft Edge, and Opera.

13. Search Engine

A search engine is a service that helps find information on the internet.

Examples: Google, Bing, and Yahoo.

Search Tips

• Use specific keywords.
• Avoid unnecessary words.
• Use quotation marks for exact phrases.

14. Email

Email stands for electronic mail. It is a method of sending and receiving messages through the internet.

Parts of an Email

• To: Recipient's address.
• Subject: Topic of the email.
• Body: Main message.
• Attachment: Additional files.

15. Advantages of Email

• Fast communication
• Low cost
• Worldwide access
• File sharing
• Paperless communication

16. Digital Communication Tools

• Email: Sending messages.
• Chat applications: Instant communication.
• Video conferencing: Face-to-face online meetings.
• Social media: Sharing information globally.

17. Cyber Safety

Cyber safety means protecting devices, information, and users while using digital technologies.

Common Online Threats

• Virus: Malicious software that damages files.
• Malware: Software designed to harm systems.
• Phishing: Fake messages intended to steal information.
• Hacking: Unauthorized access to a system.

18. Safe Internet Practices

• Use strong passwords.
• Do not share OTPs.
• Avoid suspicious links.
• Install antivirus software.
• Log out from public computers.
• Update software regularly.

19. Strong Password Guidelines

A good password should contain uppercase letters, lowercase letters, numbers, and special characters.

Example format only: Tech@2026Learn. Create your own unique password instead of reusing this example.

Avoid Using

• Your name
• Your mobile number
• Your date of birth

20. Digital Footprint

Every activity performed online leaves a record called a digital footprint.

Examples

• Social media posts
• Search history
• Online comments
• Uploaded photos

Importance

Digital footprints can affect future opportunities and reputation.

21. E-Governance

E-governance is the use of ICT by government to provide services electronically.

Examples

• Online bill payment
• Online certificates
• Digital identity services
• Online grievance systems

22. Advantages of ICT

• Faster communication
• Easy information access
• Improved learning
• Better record management
• Increased productivity
• Global connectivity

23. Limitations of ICT

• Cybercrime risks
• Privacy concerns
• Internet dependency
• High setup cost
• Digital addiction