EPROM

This is a memory chip whose contenst are normaly fixed. However the chip may have its contens erased by the action of ultra violet light and may then be programmed.

Disk Cach

Disk cache is a pation of a computer's RAM set aside for temporarily holding information read from disk. It holds information that either has recently been requested from disk or has precariously been written to disk.

Cache Memory

Cache is an area of memory that held frequently acceded data or instructions for the purpose of spending a computer  system performance.

Memory Main Store

There are two types of memory.

• ROM - (Read Only Memory)

• RAM - (Random Access Memory)

Memory is the name given to a group of chips inside the processing unit. Here data is held temporaritly whilst processing takes place.

Storage of data

The number of instructions and amount of data a computer can sore in its memory is measured in bytes. A single character can be stored in one byte.

Branch Prediction Unit

This is a very special part of the processor. It inspects the nature of the instructions in the instruction cache and decides which of arithmetic logic unit is best suited do.

Arithmetic Logic Unit (ALU)

This unit forms the core of the processors and it is the section that performs are actual mathematical processing on the data.