ROM is used to store instructions and information that can not be over-written. It is a non-volatile memory, which suggests when the power is off, the directions can’t be wiped out clean. Because of its non-volatile nature, it’s appropriate for retailer programs and instructions that don’t must be updated or changed like instructions for operating techniques (BIOS, fundamental input/output system). The RAM, random access memory shops the executing program instructions in addition to any knowledge that is needed. Instructions and data in the RAM are stored in unique memory places and every location has an address as properly as the instruction content material itself.