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Glossary Of Computers
This glossary of computer hardware terms is a list of definitions of terms and concepts related to computer hardware, i.e. the physical and structural components of computers, architectural issues, and peripheral devices. A B C D E F G H I J K L M N O P R S T U V W Z See also *List of computer term etymologies * Glossary of backup terms *Glossary of computer graphics This is a glossary of terms relating to computer graphics. For more general ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Computer Hardware
Computer hardware includes the physical parts of a computer, such as the central processing unit (CPU), random-access memory (RAM), motherboard, computer data storage, graphics card, sound card, and computer case. It includes external devices such as a Computer monitor, monitor, Computer mouse, mouse, Computer keyboard, keyboard, and Computer speakers, speakers. By contrast, software is a set of written instructions that can be stored and run by hardware. Hardware derived its name from the fact it is ''Hardness, hard'' or rigid with respect to changes, whereas software is ''soft'' because it is easy to change. Hardware is typically directed by the software to execute any command or Instruction (computing), instruction. A combination of hardware and software forms a usable computing system, although Digital electronics, other systems exist with only hardware. History Early computing devices were more complicated than the ancient abacus date to the seventeenth century. French ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TrueNorth
A cognitive computer is a computer that hardwires artificial intelligence and machine learning algorithms into an integrated circuit that closely reproduces the behavior of the human brain. It generally adopts a neuromorphic engineering approach. Synonyms include neuromorphic chip and cognitive chip. In 2023, IBM's proof-of-concept NorthPole chip (optimized for 2-, 4- and 8-bit precision) achieved remarkable performance in image recognition. In 2013, IBM developed Watson, a cognitive computer that uses neural networks and deep learning techniques. The following year, it developed the 2014 TrueNorth microchip architecture which is designed to be closer in structure to the human brain than the von Neumann architecture used in conventional computers. In 2017, Intel also announced its version of a cognitive chip in "Loihi, which it intended to be available to university and research labs in 2018. Intel (most notably with its Pohoiki Beach and Springs systems), Qualcomm, and others ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cache Replacement Policy
In computing, cache replacement policies (also known as cache replacement algorithms or cache algorithms) are Program optimization, optimizing instructions or algorithms which a computer program or hardware-maintained structure can utilize to manage a cache (computing), cache of information. Caching improves performance by keeping recent or often-used data items in memory locations which are faster, or computationally cheaper to access, than normal memory stores. When the cache is full, the algorithm must choose which items to discard to make room for new data. __TOC__ Overview The average memory reference time is : T = m \times T_m + T_h + E where : m = miss ratio = 1 - (hit ratio) : T_m = time to make main-memory access when there is a miss (or, with a multi-level cache, average memory reference time for the next-lower cache) : T_h= latency: time to reference the cache (should be the same for hits and misses) : E = secondary effects, such as queuing effects in multiprocessor sy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Allocation (computing)
Allocation may refer to: Computing * Block allocation map * C++ allocators * Delayed allocation * File allocation table * IP address allocation * Memory allocation * No-write allocation (cache) * Register allocation Economics * Asset allocation * Economic system * Market allocation scheme * Resource allocation * Tax allocation district Telecommunication * Call-sign allocation plan * Frequency allocation * Type allocation code Other * Allocution (law), or allocutus, is a formal statement made to the court * Allocation (oil and gas) in hydrocarbon accounting to assign the proper portions of aggregated petroleum and gas flows back to contributing sources * Allocation voting in voting * Location-allocation, used in geographic information systems (GIS) * The allocation of scarce resources in operations research See also * Location (other) A location is a fixed geographical point. Location may also refer to: Arts and entertainment * ''Location'' (EP), by t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cache Entries
Cache, caching, or caché may refer to: Science and technology * Cache (computing), a technique used in computer storage for easier data access * Cache (biology) or hoarding, a food storing behavior of animals * Cache (archaeology), artifacts purposely buried in the ground * InterSystems Caché, a database management system from InterSystems Places United States * Cache, Idaho, an unincorporated community * Cache, Illinois, an unincorporated community * Cache, Oklahoma, a city in Comanche County * Cache, Utah, Cache County, Utah * Cache County, Utah * Cache Peak (Idaho), a mountain in Castle Rocks State Park Other places * Cache, Aosta, a frazione in Italy * Cache Creek (other), several places Arts, entertainment and media * ''Caché'' (album), a 1993 album by Kirk Whalum * ''Caché'' (film), a 2005 film directed by Michael Haneke Commerce * Cache (retailer), a defunct retail clothing store * Caché, Inc., a Florida women's apparel company owned by Andre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cache Eviction
A CPU cache is a hardware cache used by the central processing unit (CPU) of a computer to reduce the average cost (time or energy) to access data (computer science), data from the main memory. A cache is a smaller, faster memory, located closer to a processor core, which stores copies of the data from frequently used main memory locations. Most CPUs have a hierarchy of multiple cache #MULTILEVEL, levels (L1, L2, often L3, and rarely even L4), with different instruction-specific and data-specific caches at level 1. The cache memory is typically implemented with static random-access memory (SRAM), in modern CPUs by far the largest part of them by chip area, but SRAM is not always used for all levels (of I- or D-cache), or even any level, sometimes some latter or all levels are implemented with eDRAM. Other types of caches exist (that are not counted towards the "cache size" of the most important caches mentioned above), such as the translation lookaside buffer (TLB) which is part of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cache Coherency
In computer architecture, cache coherence is the uniformity of shared resource data that is stored in multiple local caches. In a cache coherent system, if multiple clients have a cached copy of the same region of a shared memory resource, all copies are the same. Without cache coherence, a change made to the region by one client may not be seen by others, and errors can result when the data used by different clients is mismatched. A cache coherence protocol is used to maintain cache coherency. The two main types are snooping and directory-based protocols. Cache coherence is of particular relevance in multiprocessing systems, where each CPU may have its own local cache of a shared memory resource. Overview In a shared memory multiprocessor system with a separate cache memory for each processor, it is possible to have many copies of shared data: one copy in the main memory and one in the local cache of each processor that requested it. When one of the copies of data is c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cache (computing)
In computing, a cache ( ) is a hardware or software component that stores data so that future requests for that data can be served faster; the data stored in a cache might be the result of an earlier computation or a copy of data stored elsewhere. A cache hit occurs when the requested data can be found in a cache, while a cache miss occurs when it cannot. Cache hits are served by reading data from the cache, which is faster than recomputing a result or reading from a slower data store; thus, the more requests that can be served from the cache, the faster the system performs. To be cost-effective, caches must be relatively small. Nevertheless, caches are effective in many areas of computing because typical Application software, computer applications access data with a high degree of locality of reference. Such access patterns exhibit temporal locality, where data is requested that has been recently requested, and spatial locality, where data is requested that is stored near dat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bottleneck (other)
Bottleneck may refer to: * the narrowed portion (neck) of a bottle Science and technology * Bottleneck (engineering), where the performance of an entire system is limited by a single component * Bottleneck (network), in a communication network * Bottleneck (production), where one process reduces capacity of the whole chain * Bottleneck (software), in software engineering * Interconnect bottleneck, limits on integrated circuit performance * Internet bottleneck, slowing the performance on the Internet at a particular point * Bottleneck, a design element of some firearms cartridge cases Places * Bottleneck (K2), a mountain feature * Free State of Bottleneck, a quasi-state in Germany 1919–1923 Other uses * Choke point, or bottleneck, in miiltary strategy, a feature that reduces passability of terrain * Population bottleneck, an evolutionary event that drastically reduces a population * Traffic bottleneck, a local disruption in a transportation network See also * * Liebig' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bus (computing)
In computer architecture, a bus (historically also called a data highway or databus) is a communication system that transfers Data (computing), data between components inside a computer or between computers. It encompasses both Computer hardware, hardware (e.g., wires, optical fiber) and software, including communication protocols. At its core, a bus is a shared physical pathway, typically composed of wires, traces on a circuit board, or busbars, that allows multiple devices to communicate. To prevent conflicts and ensure orderly data exchange, buses rely on a communication protocol to manage which device can transmit data at a given time. Buses are categorized based on their role, such as system buses (also known as internal buses, internal data buses, or memory buses) connecting the Central processing unit, CPU and Computer memory, memory. Expansion buses, also called peripheral buses, extend the system to connect additional devices, including peripherals. Examples of widely ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HD DVD
HD DVD (short for High Density Digital Versatile Disc) is an obsolete high-density optical disc format for storing data and playback of high-definition video.Alternative Uses for your soon to be obsolete HD-DVD Player . Retrieved September 18, 2019.Format Wars Retrieved September 18, 2019.HD DVD owners 'anger' over obsolete players Retrieved September 18, 2019. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Format War
A format war is a competition between similar but mutually incompatible technical standards that compete for the same market, such as for data storage devices and recording formats for electronic media. It is often characterized by political and financial influence on content publishers by the developers of the technologies. Developing companies may be characterized as engaging in a format war if they actively oppose or avoid interoperable open-industry technical standards in favor of their own. A format war emergence can be explained because each vendor is trying to exploit cross-side network effects in a two-sided market. There is also a social force to stop a format war: when one of them wins as ''de facto'' standard, it solves a coordination problemEdna Ullmann-Margalit: ''The Emergence of Norms'', Oxford Un. Press, 1977. (or Clarendon Press 1978) for the format users. 19th century *Rail gauge. The Gauge War in Britain pitted the Great Western Railway, which used broad g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
