2e: Describe how hardware components work together in order to execute programs.

Computing Systems
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CPUCentral Processing Unit which processes data
HDDHard Disk Drive which usually stores more than a solid state drive
Main memoryStores instructions and data whilst a program is running (e.g. RAM)
RAMRandom Access Memory that stores instructions and data for programs currently running
Secondary storageStores instructions and data permanently (e.g. SSD / HDD)
SSDSolid State Drive with no moving parts that is faster than a hard disk drive
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