文章目录

The Open Source Society University (OSSU) computer-science project is a free, comprehensive path to a full Computer Science education — entirely online, entirely open source.

Whether you're a self-taught developer looking to fill knowledge gaps or a curious learner wanting a structured curriculum, this repository has become one of the most-starred resources on all of GitHub, with over 203K stars.

  • Complete CS Foundation — Covers everything from intro programming to advanced systems, compilers, AI, and more.
  • Curated Free Resources — Every course uses free textbooks, lectures, and materials from top universities like MIT, Harvard, and Stanford.
  • Structured Timeline — The curriculum is organized by estimated time commitment, so you know exactly what to tackle next.
  • Community Driven — A global community of learners supports each other through code reviews and study groups.
  • No Tuition Required — The entire path is free, making CS education accessible to anyone with an internet connection.

Clone the curriculum and pick your entry point:

# Explore the full curriculum
git clone https://github.com/ossu/computer-science

# Or browse the curriculum online at:
# https://github.com/ossu/computer-science

The repo is organized into 4 phases:

  • Intro CS — Programming fundamentals
  • Core CS — Data structures, algorithms, OS, networks, databases
  • Advanced CS — Compilers, ML, security, advanced systems
  • Final Project — Capstone to demonstrate your skills

If you've ever felt lost trying to piece together a CS education from scattered online resources, this project provides the map. It's especially powerful when paired with active learning communities — many OSSU alumni have gone on to land roles at top tech companies entirely through this self-directed path.

The curriculum is regularly updated and has spawned local meetup groups worldwide. Whether you have 5 hours a week or 20, there's a track designed for your pace.

Start today — the only prerequisite is curiosity.


This project is created by @ossuGitHub Repository