16 is an electronic (solid-state) non-volatile computer storage medium that can be electrically erased and reprogrammed 17 is a set of computer instructions in firmware that control input and output operations. (Firmware is a permanent software programmed into a read-only memory.) computer memory on which data has been prerecorded. Once data has been written onto a ROM chip, it cannot be removed and can only be read 18 19 The-_ component, inside the system unit. It performs the calculations and does the comparisons needed for processing, as well as controls the other parts of the computer system. It is referred to as the brain of the computer The __ component of the system unit attached together with a heatsink on the mother board is used to prevent overheating of the processor (CPU) on the motherboard Cache memory, also called CPU memory, is random access memory (RAM) that a computer microprocessor can access more quickly than it can access regular RAM. This memory is typically integrated directly with the CPU chip or placed on a separate chip that has a separate bus interconnect with the CPU. It isa special group of very fast memory circuitry, usually built into the CPU, that is used to speed up processing. The place where data and instructions enter or leave the core is called 20 21 This unit provides various functions, including generation of th memory and I/O addresses for the transfer of data between outside the CPU, and the Execution Unit. The of the computer processor. It holds the results of processing. It may hold a instruction, a storage address, o individual characters) Th and makes sure they are in the proper order for processing. This is a echnique used in the CPU to speed up the execution of a program by reducing wait states The operations. It represents the fundamental building block of the central 23 is one of a small set of data holding places that are part r any kind of data (such as a bit sequence o 24 unit requests instructions and data from cache or RAM 25 unit is a digital circuit used to perform arithmetic and logic rocessing unit (CPU) of a computer