Introduction to IT Systems is a thoroughly designed, foundational textbook that provides learners with essential digital skills required in today’s technology-driven world. Covering everything from basic internet operations to advanced system management and cybersecurity, the book serves as a complete guide for students, educators, and professionals entering the field of information technology.

The content begins with fundamental internet skills—browsers, search engines, portals, digital literacy, and the Digital India ecosystem—empowering learners to navigate the online world confidently. The second section introduces core computer concepts, including hardware components, software types, data handling, networking essentials, and emerging technologies such as AI, machine learning, cloud computing, and virtual/augmented reality.

A dedicated unit on operating systems provides hands-on knowledge of Windows and Linux installation, dual booting, troubleshooting, security settings, and post-installation configuration. Learners also acquire practical experience with Unix shell navigation, commands, vi editor, scripting, and environment variables.

The book further equips readers with modern web development skills through HTML and CSS, enabling them to create, style, and publish functional personal webpages. The final unit focuses on comprehensive information security best practices—covering cyber threats, encryption, risk management, secure coding, network security, incident response, and regulatory compliance.

With real-world examples, step-by-step tutorials, glossaries, and exercises, this book is an indispensable resource for building strong IT literacy and preparing learners for future digital careers.

Nishant Kumar:Assistant Professor, Department of Computer Science and Engineering, Gurukula Kangri (Deemed to be University), Haridwar, Uttarakhand

Suyash Bhardwaj: Assistant Professor, Department of Computer Science and Engineering
Gurukula Kangri (Deemed to be University), Haridwar,Uttarakhand

Namit Khanduja:Assistant Professor, Department of Computer Science and Engineering, Gurukula Kangri (Deemed to be University), Haridwar, Uttarakhand

Chapter 01.Basic Internet Skills
    1.1 Introduction
    1.2 Understanding Browsers
    1.3 Efficient Use of Search Engines
    1.4 Awareness about Digital India
    1.5 Portals
    1.6 College Portals
    1.7 Conclusion
    1.8 Glossary

Chapter 02: Introduction to Computers
    2.1 Introduction to Computers
    2.2 Computer Hardware
    2.3 Computer Software
    2.4 Data and Information
    2.5 Computer Networking
    2.6 Computer Security
    2.7 Encryption and Decryption
    2.8 Emerging Technologies
    2.9 Conclusion
    2.10 Glossary

Chapter 03: Operating Systems and Installation
    3.1 Introduction to Operating Systems (OS)
    3.2 Getting Ready for Installation
    3.3 Installing Windows OS
    3.4 Dual Boot: Windows and Linux
    3.5 Troubleshooting OS Installation
    3.6 Enhancing OS Security During Installation
    3.7 Essential Post-Installation Tasks
    3.8 Data Backup and Recovery
    3.9 Basic OS Maintenance

Chapter 04: Unix Shell and Scripting
    4.1 Introduction to Unix Shell
    4.2 Navigation & File Management
    4.3 Unix Commands
    4.4 Vi Editor
    4.5 Environment Variables
    4.6 Shell Scripting
    4.7 Conclusion
    4.8 Glossary
    4.9 References

Chapter 05: HTML and CSS
    5.1 Introduction to HTML and CSS
    5.2 Setting Up the Development Environment
    5.3 Basic HTML Structure
    5.4 Adding Content to Webpages
    5.5 Styling with CSS
    5.6 Creating a Personal Webpage Layout
    5.7 Enhancing Webpages with CSS
    5.8 Conclusion
    5.9 Glossary
    5.10 Complete Webpage Code

Chapter 06: Information Security Best Practices
    6.1 Introduction to Information Security
    6.2 Threats to Information Security
    6.3 Risk Assessment and Management
    6.4 Password and Account Security
    6.5 Data Encryption and Decryption
    6.6 Network Security Best Practices
    6.7 Secure Software Development
    6.8 Employee Training & Awareness
    6.9 Incident Response & Disaster Recovery
    6.10 Legal & Regulatory Compliance
    6.11 Emerging Threats & Future Directions
    6.12 Best Practice Recommendations
    6.13 Glossary