Skip to content

OCR A-Level Computer Science Revision Notes

Notes for all 24 H446 topics, written to the specification numbering so nothing is missed, with definitions, worked examples and exam tips. Pick a topic to start reading.

Paper 1 · Computer Systems

H446/01 · sections 1.1 to 1.5

1.1 The characteristics of contemporary processors, input, output and storage devices

1.2 Software and software development

1.3 Exchanging data

1.4 Data types, data structures and algorithms

1.5 Legal, moral, cultural and ethical issues

Paper 2 · Algorithms and Programming

H446/02 · sections 2.1 to 2.3

2.1 Elements of computational thinking

2.2 Problem solving and programming

2.3 Algorithms