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Free CS/IT Tutorials & Handwritten Notes for B.Tech Students

CSE Gyan brings together free tutorials and premium handwritten notes covering the core subjects taught in every B.Tech Computer Science and IT curriculum. Whether you're preparing for a semester exam, catching up on a topic you missed in class, or building foundational programming skills for your career, this page is the starting point for all our study material — organized by subject so you can jump straight to what you need.

Each subject below links to a dedicated notes page covering every chapter in that topic, from fundamental concepts to more advanced material, explained in simple language with diagrams and examples wherever helpful.

What You'll Find Across These Subjects

Core computer science theory — Operating Systems, DBMS, and Computer Networks
Programming fundamentals — Data Structures, Python, C++, and JavaScript
Engineering process subjects — Software Engineering and Computer Organization
Web development skills — HTML, CSS, and modern JavaScript
Database querying — a complete SQL tutorial series with interview prep

Operating System

Processes, CPU scheduling, memory management, deadlocks and file systems.

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Data Structure

Arrays, stacks, queues, linked lists, trees, graphs and algorithms.

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Database Management System

ER model, normalization, transactions, indexing and SQL fundamentals.

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Software Engineering

Process models, SRS, design, testing, maintenance and project management.

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Computer Network

Basics of networking, models, topologies, protocols, and network security concepts.

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C Programming

Learn C Programming from basics to advanced including variables, loops, functions, pointers, arrays, file handling, and programming concepts.

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C++ Programming

Learn C++ basics, OOP concepts, syntax, data types, functions, classes, and programming logic.

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Computer Organization & Architecture

Study of CPU structure, memory hierarchy, instruction sets, input-output organization, and system design concepts.

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Python Programming

Learn Python basics, syntax, data types, control structures, functions, OOP concepts, and real-world programming applications.

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SQL Tutorials

Master SQL with step-by-step lessons covering queries, data types, tables, joins, functions, constraints, transactions, and database management concepts.

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HTML Tutorials

Learn HTML from basics to advanced concepts with step-by-step tutorials covering HTML structure, tags, attributes, headings, links, images, tables, forms, multimedia, semantic elements, and webpage development.

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Modern CSS Styling Techniques

Explore modern CSS concepts from fundamentals to advanced styling techniques, including selectors, Flexbox, Grid, animations, transitions, responsive design, custom properties, layouts, and modern UI development practices.

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JavaScript Fundamentals

Master JavaScript from beginner to advanced concepts, including variables, data types, operators, functions, loops, conditions, arrays, objects, DOM manipulation, events, form validation, asynchronous programming, and modern ES6+ features for interactive web development.

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Java Programming

Learn Java Programming from basic to advanced concepts, including Java syntax, variables, data types, operators, control statements, arrays, strings, methods, object-oriented programming, inheritance, polymorphism, exception handling, collections, file handling, multithreading, JDBC, and modern Java features for software development.

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Theory of Computation

Learn finite automata, regular expressions, context-free grammar, Turing machines, decidability, and computational theory concepts.

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Compiler Design

Learn compiler phases, lexical analysis, syntax analysis, semantic analysis, code generation, optimization, and compiler construction concepts.

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Frequently Asked Questions

Which subject should I start with?

If you're early in your degree, starting with Data Structures and one programming language (Python or C++) builds the strongest foundation, since most other subjects assume basic programming knowledge. If you're preparing for a specific upcoming exam, jump directly to that subject's notes page.

Are the free tutorials different from the paid handwritten notes?

The free tutorials on this page cover the core concepts of each subject and are great for learning and quick revision. Our paid handwritten notes go into more depth with additional diagrams, solved examples, and exam-focused explanations for students who want a more complete study resource.

Do these notes follow a specific university syllabus?

Our notes are designed around the core concepts common to most Indian university curriculums, including AKTU, RGPV, GGSIPU, and others, since the fundamentals of these subjects remain largely consistent across universities.