They are the most important part of a compuer as known as computer hardware.These all parts work only when
they are connected in a certain order and get data and instructions.Computerhardware is the physicaly
components of a computer. RAM,ROM,microprocessor, moniter, kyeboard etc. Computer memmory is the part of computer
that stores data or programs. A computer system has three types of memory: primary memory, cache memory and
secondary memory.they are use primary memory internal memory is semiconductors-based memory thata store or
programs temporarily.cache memory is a fast memory that stores data and instruction which are repeatedly
required ti run programs in order to improve system speed.Secondary memory external memory stores data
and informations or programs premanently. The microprocessor of a computeraccess data and programs of a
secondary device.The magnetic coated surface of disk stores data in the from of a large reel, a small cartridge
and cassette.optical strage devices use laser light techonology to retrieve and store data.
