Arithmetic Logic Unit (ALU) - Carries out the LOGICAL, SHIFT and Arithmetic operations., Control Unit (CU) - Coordinates activities taking place in the CPU. , Memory Address Register (MAR) - Holds the address of the instruction or data that needs to be fetched or stored. , Memory Data Register (MDR) - Holds data or program instruction temporarily when it is fetched or before it is stored in the memory, Program Counter (PC) - Holds address of the next instruction to be processed, Accumulator (ACC) - Temporarily holds results of operations carried out in the ALU , Clock Speed - Pulse rate measured in hertz used to synchronise the activities taking place in the CPU. , Cache Memory - Volatile memory that holds most frequently used instructions., Cores - Multiple processors within one CPU that can independently carry out multiple instructions simultaneously, Embedded System - Purpose built computational device designed to perform a specific function., Random Access Memory (RAM) - Volatile Main Memory that holds currently used instructions , Virtual Memory (VM) - Partitioned section of secondary storage that acts as main memory., Read Only Memory (ROM) - Non-volatile memory that holds the bootstrap loader., Primary Storage - RAM, ROM and Cache memory., Secondary Storage - HDD, SSD, Optical Drive, Magnetic Hard Drive (HDD) - Non-Volatile Secondary storage that contains moveable parts., Solid State Drive (SSD) - Non-Volatile Secondary storage that uses flash memory chips., Optical Device - A compact disc (CD) that relies on an reader to be accessed by the computer., Cost - the price of storage per GB., Speed - How quickly data can be read from or written to a storage device., Capacity - Amount of storage space available on a storage device, Portability - The ease with which a storage device can be unplugged and moved., Durability - How well a storage device can resist damage., Reliablity - The longevity of a storage device.,

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