* '''Dynamic Memory:''' It is a volatile memory which also requires constant power to store information, it is periodically refreshed, or read and rewritten without modifications. Example [https://en.wikipedia.org/wiki/Dynamic_random-access_memory DRAM (Dynamic Random Access Memory)]. DRAM is less expensive than SRAM, but SRAM is much faster than DRAM

* '''Non-volatile memory:''' It will retain the stored information even if it is not constantly supplied with electrical power. For example [https://en.wikipedia.org/wiki/Flash_memory Flash], [https://en.wikipedia.org/wiki/EEPROM EEPROM (Electrically Erasable Programmable Read-Only Memory)] and magnetic memory (HDD).

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