Computer Memory

Memory is an important part of a Computer system. A computer system comprises of two types of memory:-  Primary memory and Secondary memory.

Primary Memory

It is considered as the main memory of the computer system. It is temporary memory. The data and instructions that we are working while running programs are stored in Primary memory. It is regarded as the main memory as we need to store the data that we are working on until we proceed for the output. Primary memory has got specified slot in the Motherboard of the computer system. It is also known as volatile memory. Primary memory is expensive than secondary memory.

RAM(Random Access Memory), ROM(Read Only Memory), DRAM(Dynamic RAM), SRAM(Static RAM), FPM(Fast Page Mode Ram), EDORAM(Extended Data Out RAM), SDRAM(Synchronous DRAM), PROM(Programmable ROM), EPROM(Erasable Programmable ROM), EEPROM(Electrically Erasable Programmable ROM) etc are some of the types of primary Memory. It can be understood from the following table:-

Memory    Type	Use
ROM	BIOS, CMOS, Special Function Chips
RAM	Main Memory
DRAM	Chips on SIMM boards or Motherboard
SRAM	Used as external cache
FPM	Used in 486 or older motherboards
EDO RAM	Used on Pentium or later motherboards
SDRAM	It is used on 168 pin DIMM chips.
FLASH	It is on a memory card