Memory

Cosma / Communication / Media / Storage / Hardware / Memory

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Introduction¹

Dictionary

memory : a device (as a chip) or a component of a device in which information especially for a computer can be inserted and stored and from which it may be extracted when wanted — Webster See also OneLook

FOLDOC: Free Online Dictionary of Computing

Glossary

Glossary of Computer and Internet Terms (PC.net)

Encyclopedia

Memory refers to the computer hardware devices used to store information for immediate use in a computer; it is synonymous with the term “primary storage”. Computer memory operates at a high speed, for example random-access memory (RAM), as a distinction from storage that provides slow-to-access program and data storage but offers higher capacities. If needed, contents of the computer memory can be transferred to secondary storage, through a memory management technique called “virtual memory”. An archaic synonym for memory is store.

The term “memory”, meaning “primary storage” or “main memory”, is often associated with addressable semiconductor memory, i.e. integrated circuits consisting of silicon-based transistors, used for example as primary storage but also other purposes in computers and other digital electronic devices. There are two main kinds of semiconductor memory, volatile and non-volatile. Examples of non-volatile memory are flash memory (used as secondary memory) and ROM, PROM, EPROM and EEPROM memory (used for storing firmware such as BIOS). Examples of volatile memory are primary storage, which is typically dynamic random-access memory (DRAM), and fast CPU cache memory, which is typically static random-access memory (SRAM) that is fast but energy-consuming, offering lower memory areal density than DRAM.

Most semiconductor memory is organized into memory cells or bistable flip-flops, each storing one bit (0 or 1). Flash memory organization includes both one bit per memory cell and multiple bits per cell (called MLC, Multiple Level Cell). The memory cells are grouped into words of fixed word length, for example 1, 2, 4, 8, 16, 32, 64 or 128 bit. Each word can be accessed by a binary address of N bit, making it possible to store 2 raised by N words in the memory. This implies that processor registers normally are not considered as memory, since they only store one word and do not include an addressing mechanism.

Typical secondary storage devices are hard disk drives and solid-state drives. — Wikipedia

Computer Memory (Encyclopædia Britannica)

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Innovation

Technology

Memory Upgrade, How to.. (Computer Memory Upgrade)
Computer Memory Upgrade.net (Computer Memory Upgrade)

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Preservation

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Participation

Education

MERLOT: Multimedia Educational Resource for Learning and Online Teaching
OER Commons: Open Educational Resources

Course

Crash Course: Computer Science (YouTube Channel)

Community

News

Data / Storage And Retrieval (Communications of the ACM)
Memory News (IEEE Spectrum)

Book

ISBNdb

Government

Document

USA.gov

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Expression

Fun

Game

Future

A kilobyte rewritable atomic memory (Nature Nanotechnology)
Nanoscale Memory (Franz Himpsel, U. Wisconsin)

More…

Communications of the ACM: Data / Storage And Retrieval The latest news, opinion and research in data / storage and retrieval, from Communications online.

The Dynamics of Remembering and Forgetting
on July 1, 2022 at 4:00 am
Carlos Baquero and Rosa Cabecinhas consider how we make assumptions about authors' roles and relative contributions when reading papers.
Building a Practical Quantum Computer
on July 1, 2022 at 4:00 am
Quantum computation has a long road ahead.
Brain Implants Get Real
on July 1, 2022 at 4:00 am
Universities, and a growing number of companies, are producing brain-computer interfaces.
Surveillance Too Cheap to Meter
on July 1, 2022 at 4:00 am
Stopping Big Brother would require an expensive overhaul of the entire system.
Apple's Challenge to Virtualization Software
on July 1, 2022 at 4:00 am
Is it okay for security researchers to virtualize software to look for vulnerabilities?

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Here are links to pages about closely related subjects.

Media

Function	Communications	Computation	Storage	Creation	Simulation
Analog	Mail	Device	Paper	Type, Print	Automaton
Electronic	Network	Calculator	Tape	Record	Elektro
Digital	Internet	Computer
Hardware	Modem	Microprocessor	Memory	Peripheral	Robot, XR
Software	Service (Web)	Program (OS, SS)	Database	Application	AI, VW

Format Multimedia (Video, Animation) Image (Object) Scent, Flavor, Audio (Text) Haptic, “Other“

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Notes

1. The resources on this page are are organized by a classification scheme developed exclusively for Cosma.