Learn Computer Science Free

Software & IT

Start with Data Structures and Algorithms Full Course 📈 (240 min, Bro Code), then 10 Design Patterns Explained in 10 Minutes (11 min, Fireship). All 510 lessons here are free, from the teachers' own official uploads. You'll need laptop stand, noise-cancelling headphones, second monitor and a few more basics (about $270 of kit). The book to keep beside you: Code by Charles Petzold.

What you'll need

• Laptop stand: Screen at eye level for long study sessions.
• Noise-cancelling headphones: Focus through long video lessons.
• Second monitor: Video on one screen, practice on the other.
• Wireless keyboard and mouse: Comfortable for hours of typing.

Lessons

• Data Structures and Algorithms Full Course 📈 (240 min, Bro Code, Intermediate)
• 10 Design Patterns Explained in 10 Minutes (11 min, Fireship, Intermediate)
• 100+ Computer Science Concepts Explained (13 min, Fireship, Intermediate)
• 100+ Linux Things you Need to Know (12 min, Fireship, Intermediate)
• Data Structures and Algorithms in Python - Full Course for Beginners (751 min, freeCodeCamp.org, Beginner)
• Every operating system concept in one video… (12 min, Fireship, Intermediate)
• 10 weird algorithms every developer should know (9 min, Fireship, Intermediate)
• CS50 2021 in HDR - Lecture 0 - Scratch (105 min, CS50, Intermediate)
• Data Structures and Algorithms for Beginners (79 min, Programming with Mosh, Beginner)
• Learn coding in 3 months, step by step coding roadmap | How to learn to code for absolute beginners? (23 min, codebasics, Beginner)
• The greatest unsolved problem in computer science... (7 min, Fireship, Intermediate)
• CS50 2020 - Lecture 0 - Scratch (102 min, CS50, Intermediate)
• GPT-4 - How does it work, and how do I build apps with it? - CS50 Tech Talk (54 min, CS50, Intermediate)
• Greedy Algorithms Tutorial – Solve Coding Challenges (113 min, freeCodeCamp.org, Intermediate)
• Large Language Models and The End of Programming - CS50 Tech Talk with Dr. Matt Welsh (67 min, CS50, Intermediate)
• Recursion in Programming - Full Course (112 min, freeCodeCamp.org, Intermediate)
• Algorithms in Python – Full Course for Beginners (131 min, freeCodeCamp.org, Beginner)
• CS50 Fall 2023 - Lecture 0 - Scratch (live, unedited) (148 min, CS50, Intermediate)
• Data Structures - Full Course for Beginners (191 min, Tech With Tim, Beginner)
• Graph Algorithms for Technical Interviews - Full Course (132 min, freeCodeCamp.org, Intermediate)
• Learn Data Structures and Algorithms Visually – Crash Course (74 min, freeCodeCamp.org, Beginner)
• Binary Tree Algorithms for Technical Interviews - Full Course (109 min, freeCodeCamp.org, Intermediate)
• CS50 Fall 2023 - Artificial Intelligence (live, unedited) (69 min, CS50, Intermediate)
• Data Structure and Algorithm Patterns for LeetCode Interviews – Tutorial (75 min, freeCodeCamp.org, Intermediate)
• Learn Stack data structures in 10 minutes 📚 (10 min, Bro Code, Intermediate)
• Linux Operating System - Crash Course for Beginners (168 min, freeCodeCamp.org, Beginner)
• CS50 Fall 2025 - Lecture 0 - Scratch (live, unedited) (140 min, CS50, Intermediate)
• CS50 Fall 2025 - Lecture 1 - C (live, unedited) (185 min, CS50, Intermediate)
• CS50's Fundamentals of AI - Lecture 0 - Playing (live, unedited) (83 min, CS50, Beginner)
• CS50x 2024 - Lecture 0 - Scratch (125 min, CS50, Intermediate)
• CS50x 2025 - Lecture 0 - Scratch (119 min, CS50, Intermediate)
• CS50x - Artificial Intelligence (48 min, CS50, Intermediate)
• CS50 Cybersecurity - Lecture 0 - Securing Accounts (73 min, CS50, Intermediate)
• CS50 for Business - Lecture 0 - Interpreting Information (67 min, CS50, Intermediate)
• CS50x 2023 - Lecture 0 - Scratch (130 min, CS50, Intermediate)
• CS50x - Lecture 0 - Scratch (121 min, CS50, Intermediate)
• Learn Queue data structures in 10 minutes 🎟️ (10 min, Bro Code, Intermediate)
• Computer Science Students - Listen Up... (11 min, Tech With Tim, Intermediate)
• CS50 2020 - Lecture 1 - C (137 min, CS50, Intermediate)
• CS50 Fall 2023 - Lecture 1 - C (live, unedited) (175 min, CS50, Intermediate)
• CS50 Fall 2023 - Lecture 3 - Algorithms (live, unedited) (155 min, CS50, Intermediate)
• CS50 Fall 2025 - Lecture 3 - Algorithms (live, unedited) (153 min, CS50, Intermediate)
• CS50P - Lecture 0 - Functions, Variables (106 min, CS50, Intermediate)
• CS50x 2024 - Lecture 5 - Data Structures (123 min, CS50, Intermediate)
• CS50x 2025 - Artificial Intelligence (56 min, CS50, Intermediate)
• How to Prepare for Technical Interviews, with CS50's own Tommy MacWilliam '13 (73 min, CS50, Intermediate)
• Learn Big O Notation In 12 Minutes (12 min, Web Dev Simplified, Intermediate)
• Search - Lecture 0 - CS50's Introduction to Artificial Intelligence with Python 2020 (110 min, CS50, Beginner)
• Think Like a Computer Science Professor (768 min, freeCodeCamp.org, Intermediate)
• Top 10 Javascript Algorithms to Prepare for Coding Interviews (113 min, freeCodeCamp.org, Intermediate)
• What is the Probability of Doom? | The CS50 Show with David J. Malan | Season 1, Episode 1 (20 min, CS50, Beginner)
• CS50 2019 - Lecture 0 - Computational Thinking, Scratch (62 min, CS50, Intermediate)
• CS50 2019 - Lecture 1 - C (106 min, CS50, Intermediate)
• CS50 2021 - Rehearsal (127 min, CS50, Intermediate)
• CS50 Fall 2023 - Lecture 2 - Arrays (live, unedited) (160 min, CS50, Intermediate)
• CS50 Fall 2025 - Lecture 2 - Arrays (live, unedited) (182 min, CS50, Intermediate)
• CS50 Fall 2025 - Lecture 4 - Memory (live, unedited) (176 min, CS50, Intermediate)
• CS50 Fall 2025 - Lecture 6 - Python (live, unedited) (188 min, CS50, Intermediate)
• CS50 Fall 2025 - Lecture 7 - SQL (live, unedited) (159 min, CS50, Intermediate)
• CS50 Fall 2025 - Lecture 9 - Flask (live, unedited) (181 min, CS50, Intermediate)

Books on Computer Science

1. Code by Charles Petzold - View on Amazon
2. Grokking Algorithms by Aditya Y. Bhargava - View on Amazon
3. Cracking the Coding Interview by Gayle Laakmann McDowell - View on Amazon
4. The Self-Taught Programmer by Cory Althoff - View on Amazon
5. Algorithms to Live By by Brian Christian - View on Amazon
6. Computer science by J. Glenn Brookshear - View on Amazon
7. Mathematical structures for computer science by Judith L. Gersting - View on Amazon
8. Concrete mathematics by Ronald L. Graham - View on Amazon
9. Software engineering by Ian Sommerville - View on Amazon
10. Languages and machines by Thomas A. Sudkamp - View on Amazon
11. Transactions on Engineering Technologies by Sio-Iong Ao - View on Amazon
12. Invitation to Computer Science by G. Michael Schneider - View on Amazon
13. Computer Science Distilled by Wladston Ferreira Filho - View on Amazon
14. Python programming by John M. Zelle - View on Amazon
15. The (new) turing omnibus by A.K. Dewdney - View on Amazon
16. Operating systems by Stuart E. Madnick - View on Amazon
17. Physics for Computer Science Students by Narciso Garcia - View on Amazon
18. Computer Science With C++ Class by Sumita Arora - View on Amazon