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Computer memory and Computer data storage types
General
Memory cell
Memory coherence
Cache coherence
Memory hierarchy
Memory access pattern
Memory map
Secondary storage
MOS memory
floating-gate
Continuous availability
Areal density (computer storage)
Block (data storage)
Object storage
Direct-attached storage
Network-attached storage
Storage area network
Block-level storage
Single-instance storage
Data
Structured data
Unstructured data
Big data
Metadata
Data compression
Data corruption
Data cleansing
Data degradation
Data integrity
Data security
Data validation
Data validation and reconciliation
Data recovery
Storage
Data cluster
Directory
Shared resource
File sharing
File system
Clustered file system
Distributed file system
Distributed file system for cloud
Distributed data store
Distributed database
Database
Data bank
Data storage
Data store
Data deduplication
Data structure
Data redundancy
Replication (computing)
Memory refresh
Storage record
Information repository
Knowledge base
Computer file
Object file
File deletion
File copying
Backup
Core dump
Hex dump
Data communication
Information transfer
Temporary file
Copy protection
Digital rights management
Volume (computing)
Boot sector
Master boot record
Volume boot record
Disk array
Disk image
Disk mirroring
Disk aggregation
Disk partitioning
Memory segmentation
Locality of reference
Logical disk
Storage virtualization
Virtual memory
Memory-mapped file
Software entropy
Software rot
In-memory database
In-memory processing
Persistence (computer science)
Persistent data structure
RAID
Non-RAID drive architectures
Memory paging
Bank switching
Grid computing
Cloud computing
Cloud storage
Fog computing
Edge computing
Dew computing
Amdahl's law
Moore's law
Kryder's law
Volatile
RAM
Hardware cache
CPU cache
Scratchpad memory
DRAM
eDRAM
SDRAM
SGRAM
LPDDR
QDRSRAM
EDO DRAM
XDR DRAM
RDRAM
DDR
GDDR
HBM
SRAM
1T-SRAM
ReRAM
QRAM
Content-addressable memory (CAM)
Computational RAM
VRAM
Dual-ported RAM
Video RAM (dual-ported DRAM)
Historical
Williams–Kilburn tube (1946–1947)
Delay-line memory (1947)
Mellon optical memory (1951)
Selectron tube (1952)
Dekatron
T-RAM (2009)
Z-RAM (2002–2010)
Non-volatile
ROM
Diode matrix
MROM
PROM
EPROM
EEPROM
ROM cartridge
Solid-state storage (SSS)
Flash memory is used in:
Solid-state drive (SSD)
Solid-state hybrid drive (SSHD)
USB flash drive
IBM FlashSystem
Flash Core Module
Memory card
Memory Stick
CompactFlash
PC Card
MultiMediaCard
SD card
SIM card
SmartMedia
Universal Flash Storage
SxS
MicroP2
XQD card
Programmable metallization cell
NVRAM
Memistor
Memristor
PCM (3D XPoint)
MRAM
Electrochemical RAM (ECRAM)
Nano-RAM
CBRAM
Early-stage NVRAM
FeRAM
ReRAM
FeFET memory
Analog recording
Phonograph cylinder
Phonograph record
Quadruplex videotape
Vision Electronic Recording Apparatus
Magnetic recording
Magnetic storage
Magnetic tape
Magnetic-tape data storage
Tape drive
Tape library
Digital Data Storage (DDS)
Videotape
Videocassette
Cassette tape
Linear Tape-Open
Betamax
8 mm video format
DV
MiniDV
MicroMV
U-matic
VHS
S-VHS
VHS-C
D-VHS
Hard disk drive
Optical
3D optical data storage
Optical disc
LaserDisc
Compact Disc Digital Audio (CDDA)
CD
CD Video
CD-R
CD-RW
Video CD
Super Video CD
Mini CD
Nintendo optical discs
CD-ROM
Hyper CD-ROM
DVD
DVD+R
DVD-Video
DVD card
DVD-RAM
MiniDVD
HD DVD
Blu-ray
Ultra HD Blu-ray
Holographic Versatile Disc
WORM
In development
CBRAM
Racetrack memory
NRAM
Millipede memory
ECRAM
Patterned media
Holographic data storage
Electronic quantum holography
5D optical data storage
DNA digital data storage
Universal memory
Time crystal
Quantum memory
UltraRAM
Historical
Paper data storage (1725)
Punched card (1725)
Punched tape (1725)
Plugboard
Drum memory (1932)
Magnetic-core memory (1949)
Plated-wire memory (1957)
Core rope memory (1960s)
Thin-film memory (1962)
Disk pack (1962)
Twistor memory (~1968)
Bubble memory (~1970)
Floppy disk (1971)
v
t
e
Rope memory from the Apollo Guidance Computer
Photo detail of a 16Kb rope core memory board from a 1974 computer
Core rope memory test sample from the Apollo program
Core rope memory is a form of read-only memory (ROM) for computers. It was used in the UNIVAC I (Universal Automatic Computer I) and the UNIVAC II, developed by the Eckert-Mauchly Computer Corporation in the 1950s, as it was a popular technology for program and data storage in that era. It was later used in the 1960s by early NASA Mars space probes and then in the Apollo Guidance Computer (AGC),[1] which was built by Raytheon.
The software for the AGC was written by programmers at the Massachusetts Institute of Technology (MIT) Instrumentation Lab, and was woven into core rope memory by female workers in factories.[2] Some programmers nicknamed the finished product LOL memory, for Little Old Lady memory.[3]
^"Software as Hardware: Apollo's Rope Memory". Retrieved 29 Sep 2017.
^"Computer for Apollo". MIT Science Reporter. 1965. WGBH.
^Directed and Produced by: Duncan Copp, Nick Davidson, Christopher Riley (2008-07-07). "The Navigation Computer". Moon Machines. Episode 3. 22:40 minutes in. Science Channel.
Coreropememory is a form of read-only memory (ROM) for computers. It was used in the UNIVAC I (Universal Automatic Computer I) and the UNIVAC II, developed...
read-only memory known as coreropememory, fashioned by weaving wires through and around magnetic cores, though a small amount of read/write corememory is...
16 September 2009. Pádraig Brady. "Multi-Core". Retrieved 16 September 2009. van der Pas, Ruud (2002). "Memory Hierarchy in Cache-Based Systems" (PDF)...
terms RAM, main memory or primary storage. Archaic synonyms for main memory include core (for magnetic corememory) and store. Main memory operates at a...
Volatile memory, in contrast to non-volatile memory, is computer memory that requires power to maintain the stored information; it retains its contents...
of MOS memory chips. NMOS memory was commercialized by IBM in the early 1970s. MOS memory overtook magnetic corememory as the dominant memory technology...
Dynamic Random-Access Memory (DDR SDRAM) is a double data rate (DDR) synchronous dynamic random-access memory (SDRAM) class of memory integrated circuits...
drum storage drives. Drums were displaced as primary computer memory by magnetic corememory, which offered a better balance of size, speed, cost, reliability...
Historically, memory has, depending on technology, been called central memory, corememory, core storage, drum, main memory, real storage, or internal memory. Meanwhile...
High Bandwidth Memory (HBM) is a computer memory interface for 3D-stacked synchronous dynamic random-access memory (SDRAM) initially from Samsung, AMD...
Embedded DRAM (eDRAM) is dynamic random-access memory (DRAM) integrated on the same die or multi-chip module (MCM) of an application-specific integrated...
storage in a form of magnetic drum, or corememory, coreropememory, thin film memory, twistor memory or bubble memory. Unlike modern computers, magnetic...
or E2PROM (electrically erasable programmable read-only memory) is a type of non-volatile memory. It is used in computers, usually integrated in microcontrollers...
similar to magnetic-corememory, a system commonly used in the 1960s. However, due to process and material variations, an array of memory cells has a distribution...
File operations of traditional mass storage devices such as flash drives, memory cards and hard drives can be simulated using a UDF live file system. For...
medium is sometimes called digital data. Computer data storage is one of the core functions of a general-purpose computer. Electronic documents can be stored...
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