18-letter words containing a, n, c, o
- 16-bit application — (operating system) Software for MS-DOS or Microsoft Windows which originally ran on the 16-bit Intel 8088 and 80286 microprocessors. These used a segmented address space to extend the range of addresses from what is possible with just a 16-bit address. Programs with more than 64 kilobytes of code or data therefore had to waste time switching between segments. Furthermore, programming with segments is more involved than programming in a flat address space, giving rise to warts like memory models in C and C++. Compare 32-bit application.
- 32-bit application — (architecture, operating system) IBM PC software that runs in a 32-bit flat address space. The term 32-bit application came about because MS-DOS and Microsoft Windows were originally written for the Intel 8088 and 80286 microprocessors. These are 16 bit microprocessors with a segmented address space. Programs with more than 64 kilobytes of code and/or data therefore had to switch between segments quite frequently. As this operation is quite time consuming in comparison to other machine operations, the application's performance may suffer. Furthermore, programming with segments is more involved than programming in a flat address space, giving rise to some complications in programming languages like "memory models" in C and C++. The shift from 16-bit software to 32-bit software on IBM PC clones became possible with the introduction of the Intel 80386 microprocessor. This microprocessor and its successors support a segmented address space with 16-bit and 32 bit segments (more precisely: segments with 16- or 32-bit address offset) or a linear 32-bit address space. For compatibility reasons, however, much of the software is nevertheless written in 16-bit models. See also Win32s.
- a good second best — an acceptable alternative
- a slap on the back — congratulation
- absorption costing — a method of cost accounting in which overheads are apportioned to cost centres, where they are absorbed using predetermined rates
- accident proneness — the unconscious tendency, thought to exist in some people, to involve themselves in a large number of accidents
- accommodation bill — a bill of exchange cosigned by a guarantor: designed to strengthen the acceptor's credit
- accommodation line — insurance that, by itself, would not be acceptable to an insurer but is written in connection with other policies as an accommodation to an agent or broker.
- accommodation road — a road that serves residential properties or a piece of land but which is not considered a public highway
- according to hoyle — according to the rules and regulations; in the prescribed, fair, or correct way
- account receivable — a current asset account showing amounts payable to a firm by customers who have made purchases of goods and services on credit
- accounting machine — a machine for performing bookkeeping functions, as arithmetic operations or vertical and horizontal tabulations.
- accretionary wedge — a body of deformed sediments, wedge-shaped in two dimensions or prism-shaped in three dimensions, that has been scraped off the surface of the oceanic lithosphere as it moves downwards beneath a continent or island arc. The sediments are added to the continental edge
- accumulation point — a point such that every neighborhood of the point contains at least one point in a given set other than the given point.
- acid precipitation — meteorological precipitation that is relatively acidic.
- acorn online media — (company) A company formed in August 1994 by Acorn Computer Group plc to exploit the ARM RISC in television set-top box decoders. They planned to woo British Telecommunications plc to use the box in some of its video on demand trials. The "STB1" box was based on an ARM8 core with additional circuits to enable MPEG to be decoded in software - possibly dedicated instructions for interpolation, inverse DCT or Huffman table extraction. A prototype featured audio MPEG chips, Acorn's RISC OS operating system and supported Oracle Media Objects and Microword. Online planned to reduce component count by transferring functions from boards into the single RISC chip. The company was origianlly wholly owned by Acorn but was expected to bring in external investment. In 1996 they releasd the imaginatively titled "Set Top Box 2" (STB20M) with a 32 MHz ARM 7500 and 2 to 32 MB RAM. There was also a "Set Top Box 22".
- acorn risc machine — (processor) The original name of the Advanced RISC Machine.
- acoustic impedance — the total reaction of a medium to the transmission of sound through it, expressed as the ratio of sound pressure to particle velocity at a given point in the medium.
- acoustic inertance — inertance.
- acoustic phonetics — the branch of phonetics concerned with the acoustic properties of human speech
- acoustic reactance — acoustic impedance caused by the inertia and elasticity of the transmitting medium.
- acute inflammation — body's response to infection
- adenocarcinomatous — Of or pertaining to adenocarcinomas.
- admirable crichton — a comedy (1902) by Sir James M. Barrie.
- advice and consent — a phrase in the Constitution (Article II, Section 2) allowing the Senate to restrain presidential powers of appointment and treaty-making.
- aeronautical chart — a topographic map of an area of the earth's surface, designed as an aid to aircraft navigation
- aerospace medicine — aviation medicine
- aerothermodynamics — the study of the exchange of heat between solids and gases, esp of the heating effect on aircraft flying through the air at very high speeds
- affirmative action — Affirmative action is the policy of giving jobs and other opportunities to members of groups such as racial minorities or women who might not otherwise have them.
- african lion hound — one of a South African breed of medium-sized muscular hunting dogs having a short, glossy, red or tan coat, with a characteristic ridge of hair along the spine consisting of parallel crowns of hair growing in the opposite direction of the rest of the coat, originally developed for hunting lions but now used primarily as a guard dog.
- african yellowwood — a tree, Podocarpus elongatus, of tropical Africa and the mountains of southern Africa, having globe-shaped fruit, grown as an ornamental.
- age discrimination — discrimination against older people, especially by employers
- agostino di duccio — 1415–81, Italian sculptor, noted for his carved marble panels in the interior of the Tempio Malatestiano at Rimini
- airspeed indicator — a dial that indicates the airspeed at which an aircraft is travelling
- alarm clock briton — a British worker with a moderate income, whose daily routine involves preparing children for school and going out to work
- alcohol dependence — alcoholism.
- alcoholic solution — An alcoholic solution is mixture of water and ethanol, used as a solvent.
- alexius i comnenus — 1048–1118, ruler of the Byzantine Empire (1081–1118)
- algebraic equation — an equation in the form of a polynomial having a finite number of terms and equated to zero, as 2 x 3 + 4 x 2 − x + 7 = 0.
- algebraic function — any function which can be constructed in a finite number of steps from the elementary operations and the inverses of any function already constructed
- algebraic notation — the standard method of denoting the squares on the chessboard, by allotting a letter, a, b, c, up to h, to each of the files running up the board from White's side, starting from the left, and a number to each of the ranks across the board, starting with White's first rank
- almoner's cupboard — a cupboard with pierced doors, formerly used as a storage place for food.
- alternative comedy — a style of comedy originating in the UK in the 1980s that seeks to avoid racist or sexist stereotypes, and usually puts forward left-wing, anti-establishment views
- alternative school — any public or private school having a special curriculum, especially an elementary or secondary school offering a more flexible program of study than a traditional school.
- amdahl corporation — (company) A US computer manufacturer. Amdahl is a major supplier of large mainframes, UNIX and Open Systems software and servers, data storage subsystems, data communications products, applications development software, and a variety of educational and consulting services. Amdahl products are sold in more than 30 countries for use in both open systems and IBM plug-compatible mainframe computing environments. Quarterly sales $397M, profits $13M (Aug 1994). In 1997 Amdahl became a division of Fujitsu.
- american brooklime — any of various speedwells found along brooks, in marshes, etc., as Veronica americana (American brooklime) a creeping plant having leafy stems and loose clusters of small blue flowers.
- american chameleon — anole: lizards of this type (family Iguanidae) are incorrectly called “chameleons”
- american cockroach — a large, reddish-brown cockroach, Periplaneta americana, found originally in the southern U.S. but now widely distributed.
- aminosuccinic acid — aspartic acid.
- ammonium carbamate — a white soluble crystalline compound produced by reaction between dry ammonia and carbon dioxide and used as a nitrogen fertilizer. Formula: (NH4)CO2NH2
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