1.1 - System architecture

1.1.1 Architecture of the CPU

1.1.2 CPU performance

1.1.3 Embedded systems

1.2 - Memory and storage

1.2.1 Primary storage (Memory)

1.2.2 Secondary storage

1.2.3 Units

1.2.4 Data storage

1.2.5 Compression

1.3 - Computer networks, connections and protocols

1.3.1 Networks and topologies

1.3.2 Wired and wireless networks, protocols and layers

1.4 - Network security

1.4.1 Threats to computer systems and networks

1.4.2 Identifying and preventing vulnerabilities

1.5 - Systems software

1.5.1 Operating systems

1.5.2 Utility software

1.6 - Ethical, legal, cultural and environmental impacts of digital technology

1.6.1 Ethical, legal, cultural and environmental impact