A computer is an electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program.
Big ideas in computer organization
This lecture (quite long) is an excellent introduction to the deeper ideas presented on this page. I strongly advise you to watch this.
- Architecture of the central processing unit (CPU)
- Functions of the arithmetic logic unit (ALU)
- Control unit (CU)
- Registers within the CPU
- Primary memory
- Cache memory
- The machine instruction cycle
Operating systems and application systems
Simple logic gates
- Outline the architecture of the central processing unit (CPU) and the functions of the arithmetic logic unit (ALU) and the control unit (CU) and the registers within the CPU.
- Describe primary memory.
- Explain the use of cache memory.
- Explain the machine instruction cycle.
- Identify the need for persistent storage.
- Describe the main functions of an operating system.
- Outline the use of a range of application software.
- Identify common features of applications.
- Define the terms: bit, byte, binary, denary/decimal, hexadecimal.
- Outline the way in which data is represented in the computer.
- Define the Boolean operators: AND, OR, NOT, NAND, NOR and XOR.
- Construct truth tables using the above operators.
- Construct a logic diagram using AND, OR, NOT, NAND, NOR and XOR gates.
Give a brief account.
Give a detailed account or picture of a situation, event, pattern or process.
Give a detailed account including reasons or causes.
Provide an answer from a number of possibilities. Recognize and state briefly a distinguishing fact or feature.
Give the precise meaning of a word, phrase, concept or physical quantity.
Develop information in a diagrammatic or logical form.