OCR A-level Computer Science (H446)
Every topic with its OCR specification reference, free notes and tools to revise it, and your summer 2027 papers.
| Topic | Spec | Notes and tools |
|---|---|---|
| Programming techniques | 2.2.1 | |
| Object-oriented programming | 1.2.4 (object-oriented languages) | |
| Data structures | 1.4.2 and 2.3.1 | |
| Algorithms | 2.1, 2.2.2, 2.3.1 | |
| Theory of computation | 2.1 (computational thinking), 2.3.1 (Big-O), 1.4.3 (BNF and sets where taught) | |
| Number representation | 1.4.1 (data types: floating point, bitwise manipulation, sign and magnitude), 1.3.1 (compression and encryption) | |
| Boolean algebra and logic circuits | 1.4.3 | |
| Systems software and software development | 1.2.1 to 1.2.3 | |
| Processors and assembly language | 1.1.1 to 1.1.3, 1.2.1 (c) interrupts, 1.2.4 (c) and (d) assembly and addressing modes | |
| Consequences of computing and Big Data | 1.5 | |
| Communication and networking | 1.3.1 (c) and (d), 1.3.3, 1.3.4 | |
| Databases and SQL | 1.3.2 (including flat files, secondary keys, indexing and data exchange) | |
| Functional programming | 1.2.4 (programming paradigms) | |
| The programming project (NEA) | Component 03/04 (programming project) | |
| OCR A-level Computer Science (H446) mock exam | Components 01 and 02: 1.1 to 2.3 |
Your summer 2027 exams
| Paper | Date | Starts | Length |
|---|---|---|---|
| Computer systems H446/01 | Monday 7 June 2027 | 13:30 | 2h 30m |
| Algorithms and programming H446/02 | Tuesday 15 June 2027 | 9:00 | 2h 30m |
Foundation and Higher papers are sat at the same time, so one row covers both. Source: OCR AS and A Level final examination timetable, June 2027 (final timetable), read on Wed 7 Oct. PDF (opens a new tab)
Official OCR pages
- Past papers and mark schemes (opens a new tab)
- Grade boundaries (opens a new tab)
- Exam timetables (opens a new tab)
Search for H446 on the board's page to find this course.
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