RAM


RAM
/ram/, n.
computer memory available to the user for creating, loading, or running programs and for the temporary storage and manipulation of data, in which time of access to each item is independent of the storage sequence. Cf. ROM.
[r(andom)-a(ccess) m(emory)]

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Computer main memory in which specific contents can be accessed (read or written) directly by the CPU in a very short time regardless of the sequence (and hence location) in which they were recorded.

Two types of memory are possible with random-access circuits, static RAM (SRAM) and dynamic RAM (DRAM). A single memory chip is made up of several million memory cells. In a SRAM chip, each memory cell stores a binary digit (1 or 0) for as long as power is supplied. In a DRAM chip, the charge on individual memory cells must be refreshed periodically in order to retain data. Because it has fewer components, DRAM requires less chip area than SRAM; hence a DRAM chip can hold more memory, though its access time is slower.

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▪ warship part
      appurtenance fixed to the front end of a fighting vessel and designed to damage enemy ships when struck by it. It was possibly first developed by the Egyptians as early as 1200 BC, but its importance was most clearly emphasized in Phoenician, Greek, and Roman galleys (seagoing vessels propelled primarily by oars).

      The ram enjoyed a brief revival in naval warfare in the mid-19th century, notably in the American Civil War and the Austro-Italian War of 1866. At this time rams were mounted on armoured, steam-propelled warships and used effectively against wooden sailing ships. Improvements in naval ordnance and the spread of metal-hulled ships soon made the ram obsolete again, however. See also battering ram.

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Universalium. 2010.

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  • ram — ram …   Dictionnaire des rimes

  • RAM n — ram n …   English expressions

  • RAM — RAM …   Deutsch Wörterbuch

  • Ram — Ram, ram, or RAM as a non acronymic wordAs a non acronymic word Ram, ram, or RAM may refer to:Animals* Sheep, an uncastrated male of which is called a ram * Ram cichlid, a species of freshwater fish endemic to Colombia and VenezuelaMilitary*… …   Wikipedia

  • RAM — bezeichnet: Ram (Serbien), Ort in Serbien Rama (Religion), indische Gottheit Rāma bzw. Rām, iranische Gottheit, siehe Iranische Mythologie Ram (Panzer), kanadischer Panzer im II. Weltkrieg Ram (Album), Musik Album von Paul McCartney aus dem… …   Deutsch Wikipedia

  • Ram — hat folgende Bedeutungen: ein Ort in Serbien, siehe Ram (Serbien) eine indische Gottheit, siehe Rama (Religion) ein kanadischer Panzer im Zweiten Weltkrieg, siehe Ram (Panzer) darauf basierend der Mannschaftstransporter Ram Kangaroo ein Fahrzeug… …   Deutsch Wikipedia

  • Ram — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. {{{image}}}   Sigles d une seule lettre   Sigles de deux lettres > Sigles de trois lettres …   Wikipédia en Français

  • RAM — [ ram ] n. f. inv. • 1981; acronyme angl. de Random Access Memory « mémoire à accès aléatoire » ♦ Inform. Mémoire permettant une lecture ou une écriture (cf. Mémoire vive) à une adresse quelconque. La RAM est une mémoire volatile. ⊗ HOM. Rame. ●… …   Encyclopédie Universelle

  • Ram — (r[a^]m), n. [AS. ramm, ram; akin to OHG. & D. ram, Prov. G. ramm, and perh. to Icel. ramr strong.] 1. The male of the sheep and allied animals. In some parts of England a ram is called a {tup}. [1913 Webster] 2. (Astron.) (a) Aries, the sign of… …   The Collaborative International Dictionary of English

  • RAM — Ram  Рэм (танк) RAM  Random Access Memory  память с произвольной выборкой, смотри также Оперативная память; RAM (зенитный ракетный комплекс)  ЗРК самообороны надводных кораблей; RAM  Dodge RAM  полноразмерный пикап… …   Википедия

  • ram — [ram] n. [ME ramme < OE ramm, akin to MDu & OHG ram < Gmc * ramma, prob. < * rama , strong, sharp, bitter > ON rammr] 1. a male sheep 2. BATTERING RAM 3. Historical a metal projection on the bow of a warship below the waterline, used… …   English World dictionary


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