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Last updated on April 24, 2014 at 12:40 EDT

Computer memory Reference Libraries

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Memory Card
2010-12-03 22:41:28

A memory card or flash card is used for storing digital information through electronic flash memory. These memory cards are used in digital cameras, mobile phones, laptop computers, MP3 players, and video game consoles. They are compact, recordable, and they retain data without power. PC Cards were among the first commercial memory card formats to come out in the 1990s but are now relegated...

USB Flash Drive
2010-10-01 18:35:37

A USB flash drive is a flash memory data storage device that is integrated with a Universal Serial Bus. USB flash drives are most often removable and rewritable, and are much smaller than other portable storage devices. They are usually used for similar purposes that floppy disks were. Flash drives use the USB mass storage standard that is supported by most modern operating systems such as...

Read Only Memory
2010-09-27 16:59:05

Read only memory, or ROM, is a type of storage media that is used by computers and other electronic devices. The data stored in ROM cannot be modified, therefore it is largely used to distribute firmware. The most straightforward type of ROM is about as old as semiconductor technology. It is called mask ROM, and it was introduced along with the integrated circuit. Mask ROM is made up of a grid...

Random Access Memory
2010-09-27 16:50:16

Random access memory (RAM) is a form of computer data storage that takes the form of integrated circuits in order to allow stored data to be accessed in any order. Random refers to the idea that any piece of data can be restored in a constant time, regardless of its physical location and whether or not it is related to the prior piece of data. The word RAM is often associated with unstable...

Memory
2010-09-13 12:44:42

In computing, memory applies to the state information of a computing system because it is kept active in some physical structure. The term "memory" is used for the fast information in physical systems, as a distinction from physical systems which are slow to access. The term also refers to temporary state devices. Informally, computer memory refers to the physical devices used to store data or...

Input-Output
2010-09-10 14:35:45

Input/output, commonly known as I/O, is the communication that goes on between a information processing system and the outside world, which may be a person or another information processing system. The signals and data received by the system are known as inputs, and the signals and data sent from the system are known as outputs. I/O can also refer to an action as well. An input or output...

Cache
2010-09-09 12:29:38

A cache is a computer part designed to improve performance by storing data in a way that leaves room for future data to be stored. Such data may include values that were stored elsewhere, making it quicker and easier to find. Without caches, the data must be taken from its original location, which takes significantly more time. The more requests the cache can take out, the better the overall...

Hard Disk Drive
2010-09-08 11:52:07

A hard disk drive is a non-volatile storage device for digital data. It has rotating rigid platters on a motor-driven spindle that is held in a metal case. Read/write heads float on a cushion of air about the platters and encode data magnetically. Hard disk manufacturers refer to disk capacity in standard powers of 1000. Hard disk drives were invented in 1956 by IBM and have been the dominant...

Core Memory
2010-09-07 15:50:11

One form of random access computer memory is called magnetic core memory. To store information, it uses small magnetic rings that are threaded through the magnetic field. Presently, memory can still be referred to as core memory, even though the majority of it has moved to silicon chips. Core is mostly seen when recording contents of memory at the time of errors. The history of core memory...