Complete OCR A Level Computer Science H446 revision for Components 1 and 2: 232 printable pages of notes, practice and answers. What is included Component 1: Computer Systems (H446/01) - 84-page student booklet covering all 16 specification topics. Component 2: Algorithms and Programming (H446/02) - 148-page student booklet covering all 27 revision topics. Green/amber/red specification knowledge audits to identify gaps and track progress. Clear topic summaries, key terms, diagrams, worked examples and common misconceptions. Original OCR-style questions with space to write answers, plus a 60-mark integrated practice paper for each component. Answers and marking guidance for self-assessment and teacher feedback. How to use it Students can audit a topic, revise the essentials, answer questions without notes, then mark and improve their work. Suitable for independent revision, homework, intervention and exam preparation. Both PDFs are ready to print or share with your class under the applicable Tes licence. Files supplied: two A4 landscape PDF student booklets (84 and 148 pages). These are independent resources aligned to OCR A Level Computer Science H446; they are not official OCR publications.