csNINJA

Free notes, diagrams, and definitions for the new IB Computer Science syllabus (2027)!

Sl content is finally 100% complete !
This website currently covers SL content only. Now time came to start the HL part, ah . If you are an HL student, click on "let us know" , its on your left in nav bar and help us complete the notes !

This site is for the current IB CS syllabus and is optimized for desktop. Click a topic to begin:

Topic A1: Computer Fundamentals Topic A2: Networks Topic A3: Databases Topic A4: Machine Learning Topic B1: Computational Thinking Topic B2: Programming Topic B3: Object-Oriented Programming Topic B4: [HL] Abstract Data Types Full Definitions & Terms

Latest Updates (Click to view)

October 9, 2026: All of A2 Networks is now finished: Network Architecture, Data Transmissions and Network Security are live. A4 Ethical Considerations is done too.

New SQL Sandbox. Write real SQL in your browser and try 10 ready examples.
Logic Diagrams is now split into 4 pages. The K-maps page has a video and practice exercises with hidden answers.
The Syllabus Progress page now has a progress bar. SL is 47% done.
Coming next: B1 Computational Thinking and B2.1 Programming Fundamentals, with Python examples and exercises.

May 17, 2026: A2 Networks and A4 Machine Learning fundamentals are now available. A1 remains complete. Work continues on remaining topics.

#voluntarily_driven

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csNINJA is a student-run website and a CAS project. Notes are written by students for students SO there may be and there are mistakes. If you spot an error or have a suggestion, send us a message. , it will be very appreciated :)