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GCSE Computer Science · key term
The central processing unit: the processor that executes program instructions and processes data.
Used by OCR
Paper 1
Revise: Need for Primary StorageThe CPU, or central processing unit, executes the instructions that make a computer work. An instruction tells it what operation to perform; data is the information it works on. For example, a word processor contains instructions for editing text, while the text in your document is data.
When explaining why primary storage is needed, link fast access to data and instructions with the CPU being able to process them quickly.
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