Basic of Hardware

1) CPU : CPU is stands for center  processor unite. CPU is the brain of computer. It  is multiprogrameble device. main work of CPU is to recive input signal , process and give the desired output.

2) Memory : CPU store all information in the computer memry. there are two type of memory
  {a} RAM
  {b} ROM
{a} RAM ( Random Access Memory ) : It is semicoductor-based memory where the CPU or the other hardware devices can read and write data. It temporarily stores the data and it is a volatile memory.
These are two type such as
i) DRAM - Dynamic Random Access Memory
ii) SRAM - Static Random Access Memory

{b} ROM ( Read Only Memory ) : It store data permanentaly and it is non volatile memory.
The type of ROM are...
i) PROM
ii) EEPROM
iii) EPROM

3) Motherbord : Which bord in which all input and output devices are conected that bord is called main bord or mother bord. It is printed circuite bord.
on the base of technology it is two type
i) Integrated mother bord
ii) Non-Integrated mother bord

4) SMPS ( Switch Mode Power Supply ) : It is an electrical device that provides power to electronic devices and circuits. It main work recive  AC voltage and convert it into DC voltage.

5) Hard disk drive : Hard disk is a secoundary and parmannent data storage device that is placed in the system. it is similar to the human brain. It is made up og hard material ( Glass, Aluminium Cerimic ).
  on the base of Interphase there type is given below
i) PATA
ii) SATA
iii) SCSI
iv) USB
v) Wireless
* NOTE IT IS CATEGARISE ON THE BASIS OF INTERPHASE