Main components of a computer Motherboard – The main printed circuit board (PCB) where all the other system components plug in. CPU – Central processing unit, each computer has at least one CPU or a microprocessor, which runs instructions contained in computer programs and undertakes input/output operations. The CPU has many parts, including arithmetic and logic (ALU) unit, control unit, registers, etc. Arithmetic and logic unit – This completes basic calculations (arithmetic) and comparisons (logic). Comparisons are used in sorting and searching operations. Control Unit – Each machine code instruction is extracted from memory. Decoded and run calling on the ALU when necessary. The output is either written to the register for fast recall as part of subsequent instructions or back to main memory. The control unit is there to make the rest of the computer hardware do whatever is the result of the completed instruction. Registers – There are several types of register whithin the CPU a
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