Control Unit - ensures that the instructions are carried out in the correct order, ALU - carries out calculations and decision making/logic, Registers - temporary storage locations in the processor, Control Bus - determines the operation to be carried out, for example is data being written to or read from memory, Address Bus - sends the address of the storage location in memory where the instruction or data can be found, Data Bus - allows data to be sent back and forth from the main memory to the processor, Main Memory - this is made up of RAM and ROM, Processor - this has three sections, Control Unit, ALU and Registers, Input Devices - these help to input information into the computer, Output Devices - these help to output information from the computer, Backing Storage Devices - used to save a document,

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