“…ROM, RAM, EPROM, EEPROM, Flash memory, static random access memory (SRAM) [1,2], dynamic random access memory (DRAM) [3,4], synchronous dynamic random access memory (SDRAM), and the very new magnetoresistive random access memory (MRAM) that could now be seen in the electronics literature. Each one has its own merits and areas in which it may be used.…”