All about Primary Memory and Secondary Memory. RAM - Random-access memory ROM - Read-Only Memory SRAM - STATIC random-access memory DRAM - dynamic random-access memory PROM - Programmable read-only memory EPROM - erasable programmable read-only memory EEPROM - electrically erasable programmable read-only memory HDD - Hard Disk Drive FDD - Floppy Disk Drive CD - Compact Disc DVD - digital versatile disc BRD - blu ray disc HVD - Holographic Versatile Disc AUX - Auxiliary memory