Essay on computer memory
Short Essay on Computer Memory
essay Enjoy free essays, examples of research papers, sample computer memory papers, computer memory dissertation samples and paper writing tips for all students. Example papers and sample papers on the most popular essay on computer memory. Wednesday, August 22, Essay on Computer Memory. Computer memoryalso known as computer data storage, is various digital computer memory recording devices that store information for a designated period of time http: The predominant click here of computer memory, as the permanent data-retention capability of various memory of information ensures reliable storage.
The ability to write and rewrite to the same device an unlimited number of times substantially increases the utility of data storage over non rewritable technologies. Tape-based storage Magnetic storage was first used widely in early voice recorders, which originally utilized an iron based memory wire for storage and later a thin tape, coated with a magnetic oxide, which revolved around a tape head http: Essay on computer memory head could either apply an electric field, which would magnetize the material under the head at that instant essay on computer memory a particular orientation to write data, or, alternatively, sense an electric field induced by the previously magnetized computer memory passing close to a coil of wire, to read the data.
This tape-based storage was widely used for data retention in early computer systems. However, the essay nature of tapes means that the access time for information is a function read article the current position of the tape and the location of the data. Where information is located close to the current tape position, data is computer memory more quickly accessed than information stored further away.
This computer memory difference can be a matter of minutes. Where the order of access to data is not known in advance, this results in slow and unpredictable operating speeds click the following article the tape is wound forwards and backwards.
Furthermore, essay on computer memory rapid acceleration and deceleration can lead to tape stretching or even snapping, both of which affect reliability. For archival storage, tape offers an attractive combination of low cost and high data-storage memory and is widely used in this application area http: Magnetic disks The precursor of the computer memory computer memory was the drum.
Obsolete today, the drum provided essay computer first device where the speed of data access computer memory largely independent of its location. A drum comprised a cylinder of computer memory coated essay computer memory on a spindle and rotating at up to several hundred revolutions per minute.
Close to the outer surface of the drum is a line of read- write heads.
Computer memory
Since the drive is continuously rotating, it takes essay computer a few milliseconds for a piece of data to be accessed. Memory is in marked contrast to computer memory, where memory from one end of a tape to another essay on computer memory take minutes. However, the cost and complexity of drum-based storage meant that originally only the largest computer systems could make use of it. The benefits of drum-based storage led to a demand for a lower-cost method of storage for mass-market applications.
The magnetic disk was developed in response to this demand. As its name implies, a disk is a single computer memory circular sheet of material coated with a magnetic layer, once again organized as essay on computer memory tracks. Each track comprises a number of sectors with inter-sector gaps to permit easy determination of where the head is Tyson, The single head reduces costs.
Furthermore, since the disk is lighter than the drum it essay on computer memory be rotated computer memory quickly, hence reducing access time. It is this essential approach, developed in the s, to using a disk or sometimes a platter of vertically stacked disks that contemporary disk-based systems use.
Developments since the s have been many, but the essential structure has been retained. Storage density has been improved by computer memory materials with much more powerful magnetic properties, permitting more bits per unit area to be computer memory.
Disk heads have moved closer to the disk platter sometimes only a fraction of a millimeter away in order to pick up the weaker currents induced by high-density storage Tyson, This latter development has necessitated hermetically sealing the disk essay on computer memory head within a dust-free environment. Such an encapsulated storage device is often known as a Winchester disk. These disks are the most widely used today in contemporary information storage systems.
The floppy disk, a device that uses computer memory plastic coated with magnetic material for the disk, has been widely used since the mids as a low-cost, low-density, portable storage medium. Future developments By the early s essay on computer memory predominance of magnetic disk essay on computer memory was coming essay on computer memory an end.
The text-based nature of information storage was challenged by multimedia data.
Such databases required orders of magnitude more storage than text. Consequently, the demand for storage capacity rapidly increased.
Computer memory - Wikipedia
Second, new materials with superior magnetic characteristics proved to be expensive and difficult to manufacture. For applications where data is read-only or /do-my-assignment-reviews-history.html applications such as archiving where computer memory is only written once, compact-disc CD technology was rapidly adopted. The development of writeable and erasable optical-disk technology in the computer memory changed the whole data storage process.
The availability of music in this format accounts for a high level of please click for source and Internet use by people, who can download tracks and albums to highly portable mp3 personal stereos, car stereos and home stereos. A essay on computer memory information storage and retrieval medium based on laser-technology and a strong, highly resistant optical essay CD-ROM Compact Disc - Read Only Memory is one of the most popular essay on computer memory essay on computer memory of essay media http: It can hold the equivalent computer memory abouttypewritten pages, orcatalogue cards or high-density floppy diskettes.
Computer memory - Simple English Wikipedia, the free encyclopedia
Its capacity ranges between and million characters Mb depending on the type of CD used. It uses the same technology as the audio CD for recording and reading data, and can have full multimedia functionality. CD-ROM players have become standard microcomputer peripherals, and CD writers with essay on computer memory users can record their own CDs are becoming increasingly common.
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Computer memory is any physical device capable of storing information temporarily like RAM random access memory , or permanently, like ROM read-only memory. Memory devices utilize integrated circuits and are used by operating systems , software , and hardware. This memory module connects to the memory slot on a computer motherboard.
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Он почувствовал усталость, похоже, "35" сменилось на "34". Он открыл люк, и он всю жизнь ждал этого момента.
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Сияющая стрела указывала на один из меньших туннелейты добился. Все это оказалось иллюзией -- не более реальной, что многие из более старых и менее решительных народов отказались покинуть свой дом; среди них были и наши прямые предки, когда Диаспар был молод и черпал жизненные силы в общении со многими светилами.
С этим теперь уже ничего нельзя было поделать.
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