Mask ROM

Computer memory types
Volatile
RAM
DRAM SDRAM DDR GDDR HBM SRAM
Historical
Williams–Kilburn tube (1946–47) Delay line memory (1947) Mellon optical memory (1951) Selectron tube (1952) Dekatron T-RAM (2009) Z-RAM (2002–2010)
Non-volatile
ROM
Mask ROM PROM EPROM EEPROM Flash memory
NVRAM
ReRAM
Early stage NVRAM
FeRAM MRAM PCM (3D XPoint) FeFET memory
Magnetic
Magnetic tape data storage (Linear Tape-Open) Hard disk drive
Optical
Optical disc 5D optical data storage
In development
CBRAM Racetrack memory NRAM Millipede memory FJG RAM
Historical
Paper data storage (1725) Drum memory (1932) Magnetic-core memory (1949)

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