23-letter words containing p, a, b
- aberdeen proving ground — a federal reservation and U.S. Army training center in NE Maryland, S of Aberdeen and on W Chesapeake Bay, that is the site of a military testing ground.
- abstract interpretation — (theory) A partial execution of a program which gains information about its semantics (e.g. control structure, flow of information) without performing all the calculations. Abstract interpretation is typically used by compilers to analyse programs in order to decide whether certain optimisations or transformations are applicable. The objects manipulated by the program (typically values and functions) are represented by points in some domain. Each abstract domain point represents some set of real ("concrete") values. For example, we may take the abstract points "+", "0" and "-" to represent positive, zero and negative numbers and then define an abstract version of the multiplication operator, *#, which operates on abstract values: *# | + 0 - ---|------ + | + 0 - 0 | 0 0 0 - | - 0 + An interpretation is "safe" if the result of the abstract operation is a safe approximation to the abstraction of the concrete result. The meaning of "a safe approximation" depends on how we are using the results of the analysis. If, in our example, we assume that smaller values are safer then the "safety condition" for our interpretation (#) is a# *# b# <= (a * b)# where a# is the abstract version of a etc. In general an interpretation is characterised by the domains used to represent the basic types and the abstract values it assigns to constants (where the constants of a language include primitive functions such as *). The interpretation of constructed types (such as user defined functions, sum types and product types) and expressions can be derived systematically from these basic domains and values. A common use of abstract interpretation is strictness analysis. See also standard interpretation.
- acceptable daily intake — the amount of a substance that people can consume on a daily basis without damaging their health
- approbate and reprobate — to accept part of a document and reject those parts unfavourable to one's interests
- australopithecus boisei — an extinct species of very rugged, large-toothed bipedal hominid, formerly known as Zinjanthropus boisei, that lived in eastern Africa one to two million years ago.
- backwards compatibility — backward compatibility
- bird-of-paradise flower — any of various banana-like plants of the genus Strelitzia, esp S. reginae, that are native to tropical southern Africa and South America and have purple bracts and large orange or yellow flowers resembling birds' heads: family Strelitziaceae
- black-throated whipbird — an Australian whipbird, Psophodes nigrogularis
- border gateway protocol — (BGP) An Exterior Gateway Protocol defined in RFC 1267 and RFC 1268. Its design is based on experience gained with Exterior Gateway Protocol (EGP), as defined in STD 18, RFC 904 and EGP usage in the NSFNet backbone, as described in RFCs 1092 and 1093.
- branch on chip box full — (humour) (BCBF) A mythical IBM 1130 instruction whose action depended on the contents of the chip box. This was one of a long list of fake assembly language instructions that went around Indiana University in the 1970s.
- bread-and-butter pickle — an unpeeled slice of cucumber marinated in salt water and boiled with vinegar, celery seed, spices, and brown sugar.
- compact disc recordable — (storage) (CD-R) A write-once version of CD-ROM. CD-Rs can hold about 650 megabytes of data. They are very durable and can be read by normal CD-ROM drives, but once data has been written it cannot be altered. Standard prerecorded CDs have their information permanently stamped into an aluminium reflecting layer. CD-R discs have a dye-based recording layer and an additional golden reflecting layer. Digital information is written to the disc by burning (forming) pits in the recording layer in a pattern corresponding to that of a conventional CD. The laser beam heats the substrate and recording layer to approximately 250 C. The recording layer melts and the substrate expands into the space that becomes available. See also CD-RW and DVD-RAM.
- compact disc rewritable — (storage) (CD-RW) A rewritable version of CD-ROM. A CD-RW drive can write about 650 megabytes of data to CD-RW media an unlimited number of times. Most CD-RW drives can also write once to CD-R media. CD-RW media cannot be read by CD-ROM drives built prior to 1997 due to the reduced reflectivity (15% compared to 70%) of CD-RW media. CD-RW drives and media are currently (1999) more expensive than CD-R drives and media. CD-R is sometimes considered a better technology for archival purposes as the data cannot be accidentally modified or tampered with, and encourages better archival practices. Standard prerecorded CDs have their information permanently stamped into an aluminium reflecting layer. CD-WR discs have a phase-change recording layer and an additional silver (aluminium) reflecting layer. A laser beam can melt crystals in the recording layer into a non-crystalline amorphous phase or anneal them slowly at a lower temperature back to the crystalline state. The different reflectance of the areas make them appear as the 'pits' and 'lands' of a standard CD. See also CD-R and DVD-RAM.
- complain about the food — If you complain about the food, you say that you are not satisfied with it.
- computer-based training — Computer-Aided Instruction
- conditional probability — the probability of one event, A, occurring given that another, B, is already known to have occurred: written P(A|B) and equal to P(A and B)|P(B)
- debugging an empty file — (programming, humour) A humourous definition of programming that considers a complete absence of any code as a bug to be fixed.
- digital subscriber loop — Digital Subscriber Line
- dsp32 assembly language — A high-level assembly language for the DSP32 Programmable DSP Chip.
- duplication of the cube — the insoluble problem of constructing a cube having twice the volume of a given cube, using only a ruler and compass.
- embden-meyerhof pathway — the metabolic reaction sequence in glycolysis by which glucose is converted to pyruvic acid with production of ATP
- first strike capability — the ability to use nuclear missiles in an opening attack calculated to destroy the enemy's nuclear weapons
- german baptist brethren — Church of the Brethren.
- give something a rub-up — to smooth or polish something
- hypobetalipoproteinemia — (pathology) A low level of betalipoprotein (low-density lipoprotein) in the bloodstream.
- initial public offering — An initial public offering is the first offering of stock when a company goes public.
- internet public library — (IPL) A project at the University of Michigan School of Information and Library Studies to provide an on-line, 24 hour public library, chaired by an assemblage of librarians and information industry professionals. The library aims to provide library services to a target audience estimated to number 1/4 of the entire American population by the end of the century. The Internet Public Library is scheduled to go on-line in March 1995. Among the first services will be on-line reference; youth services; user education; and professional services for librarians. Mailing list: [email protected]
- keep sb at arm's length — If you keep someone at arm's length, you avoid becoming too friendly or involved with them.
- lesser peach tree borer — the larva of a clearwing moth, Synanthedon pictipes, distributed throughout the eastern U.S. and Canada but most prevalent in the South, that burrows into the injured trunks and branches of stone fruit trees.
- lymphoblastic leukaemia — a severe blood disorder in which abnormal leukocytes are identified as immature forms of lymphocytes
- magnetic susceptibility — the coefficient or set of coefficients of the magnetic intensity in any expression giving the components of magnetization as linear combinations of the components of magnetic intensity.
- netscape public license — Open source license
- north ossetian republic — a constituent republic of S Russia, on the N slopes of the central Caucasus Mountains. Capital: Vladikavkaz. Pop: 709 900 (2002). Area: about 8000 sq km (3088 sq miles)
- object management group — (body) (OMG) A consortium aimed at setting standards in object-oriented programming. In 1989, this consortium, which included IBM Corporation, Apple Computer Inc. and Sun Microsystems Inc., mobilised to create a cross-compatible distributed object standard. The goal was a common binary object with methods and data that work using all types of development environments on all types of platforms. Using a committee of organisations, OMG set out to create the first Common Object Request Broker Architecture (CORBA) standard which appeared in 1991. As of February 1998, the latest standard is CORBA 2.2.
- participant observation — a technique of field research, used in anthropology and sociology, by which an investigator (participant observer) studies the life of a group by sharing in its activities.
- past one's sell-by date — If you say that someone or something is past their sell-by date, you mean they are no longer effective, interesting, or useful.
- pat someone on the back — to congratulate or encourage someone
- pentachloronitrobenzene — a crystalline compound, C 6 Cl 5 NO 2 , used as an herbicide and insecticide. Abbreviation: PCNB.
- percentage distribution — a frequency distribution is which individual frequencies are shown as a percentage of the total frequencies
- pin someone's ears back — the organ of hearing and equilibrium in vertebrates, in humans consisting of an external ear that gathers sound vibrations, a middle ear in which the vibrations resonate against the tympanic membrane, and a fluid-filled internal ear that maintains balance and that conducts the tympanic vibrations to the auditory nerve, which transmits them as impulses to the brain.
- play by electronic mail — (games) A kind of game where the players use electronic mail to communicate. This may be done via a human moderator or an automatic mailing list exploder on some central machine or it may be fully distributed with each player just addressing his mail to all other players. This is a natural extension of "play by mail" games conducted via snail mail.
- polybrominated biphenyl — PBB.
- portable object adapter — (architecture) (POA) Part of the CORBA architecture.
- portable tool interface — (programming, standard) (PTI) A standard such as PCTE, allowing interworking between different software tools via defined interfaces to the user and to the repository or object management system.
- private branch exchange — (communications) (PBX) A telephone exchange local to a particular organisation who use, rather than provide, telephone services. The earliest PBXs were manual (Private Manual Branch EXchange, PMBX) but are now more likely to be automatic (Private Automatic Branch eXchange).
- probabilistic automaton — nondeterministic automaton
- productivity bargaining — the process of reaching an agreement (productivity agreement) through collective bargaining whereby the employees of an organization agree to changes which are intended to improve productivity in return for an increase in pay or other benefits
- programmer brain damage — (humour) (PBD) A classification of a bug which was obviously introduced by an incompetent or short-sighted programmer. Compare UBD. See also brain-damaged.
- public-key cryptography — public-key encryption
- publicly-quoted company — a company whose shares are traded on a stock exchange
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