Types of Memories
Read/Write Memory (RWM): we can store and retrieve data.
Random Access Memory (RAM): the time required to read or write a bit of memory is independent of the bit’s location.
Static Random Access Memory (SRAM):once a word is written to a location, it remains stored as long as power is applied to the chip, unless the location is written again.
Dynamic Random Access Memory (DRAM): the data stored at each location must be refreshed periodically by reading it and then writing it back again, or else it disappears.