The June 2017 A-level Computer Science paper explores fundamental and advanced topics, including the fetch-execute cycle, processor architectures, encryption methods (Caesar and Vernam ciphers), Boolean algebra, logic circuits, assembly language, and SQL database queries. The paper tests functional programming concepts and problem-solving in network configurations, data sampling, and floating-point arithmetic. Key terms: CPU architecture, logic gates, symmetric/asymmetric encryption, assembly language, SQL, databases, relational modeling, functional programming, MIDI, digital communication, floating-point errors.