bios bit bubble memory byte cmos ddr sdram delay line memory dov frohman drum memory dynamic random access memory eeprom ferroelectric ram flash memory floating-gate transistor fused quartz hexadecimal integrated circuit israeli kilobyte magnetic core memory magnetoresistive random access memory megabit megabyte microcontroller nmos logic nano-ram non-volatile memory pic microcontroller pmos logic phase-change memory plated wire memory programmable metallization cell programmable read-only memory racetrack memory read-only memory resistive random-access memory sonos selectron tube silicon static random access memory twin transistor ram twistor memory ultraviolet volatile memory williams tube z-ram