csNINJA

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

Sl content only for now
This website currently covers SL content only. Higher Level topics are not yet written. 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 Update (Click to view)

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

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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 :)