Memory+and+backing+storage


 * __Main Memory__**
 * The main reason for main memory or RAM is to store data given by the processor. The computer can only manipulate data that is in the main memory so every program executed and every file open must be in main memory before it can be used by the processor.

__**Static and dynamic are types of RAM**__
 * Static (SRAM) - is fast access memory and its chips hold their contents only if the computers on.
 * Dynamic (DRAM) - are chips which require the computer to be on but also needs a constant signal to refresh the contents of the chip.

__**Read only memory (ROM)**__
 * This is where the data can only be read from. Its contents are not lost when the computer is switched off.