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24-letter words containing p, e, r, i

  • newton-raphson iteration — (algorithm)   An iterative algorithm for solving equations. Given an equation, f x = 0 and an initial approximation, x(0), a better approximation is given by: x(i+1) = x(i) - f(x(i)) / f'(x(i)) where f'(x) is the first derivative of f, df/dx. Newton-Raphson iteration is an example of an anytime algorithm in that each approximation is no worse than the previous one.
  • non-proliferation treaty — an international agreement signed in 1968 which aims to reduce the spread of nuclear weapons
  • nonparametric statistics — the branch of statistics that studies data measurable on an ordinal or nominal scale, to which arithmetic operations cannot be applied
  • not ready for prime time — Usable, but only just so; not very robust; for internal use only. Said of a program or device. Often connotes that the thing will be made more solid Real Soon Now. This term comes from the ensemble name of the original cast of "Saturday Night Live", the "Not Ready for Prime Time Players". It has extra flavour for hackers because of the special (though now semi-obsolescent) meaning of prime time. Compare beta.
  • officers' training corps — part of the British Army which provides military leadership training to students at UK universities
  • open data-link interface — (networking, standard)   (ODI) A Novell-developed network card API that provides media and protocol independence. It allows the sharing of a single card by multiple transport layer protocols and resolves conflicts.
  • open shortest-path first — Open Shortest-Path First Interior Gateway Protocol
  • open software foundation — (body)   (OSF) A foundation created by nine computer vendors, (Apollo, DEC, Hewlett-Packard, IBM, Bull, Nixdorf, Philips, Siemens and Hitachi) to promote "Open Computing". It is planned that common operating systems and interfaces, based on developments of Unix and the X Window System will be forthcoming for a wide range of different hardware architectures. OSF announced the release of the industry's first open operating system - OSF/1 on 23 October 1990.
  • open system architecture — (operating system)   (OSA) A competitor to IBM's SNA.
  • operational requirements — (programming)   Qualitative and quantitative parameters that specify the desired capabilities of a system and serve as a basis for determining the operational effectiveness and suitability of a system prior to deployment.
  • optical character reader — the process or technology of reading data in printed form by a device (optical character reader) that scans and identifies characters. Abbreviation: OCR.
  • optical signal processor — optical computing
  • orographic precipitation — precipitation caused by the lifting of moist air over a mountain barrier.
  • parallel cousin marriage — marriage between the children of two brothers or two sisters.
  • parallel virtual machine — (parallel, networking, tool)   (PVM) 1. A software system designed to allow a network of heterogeneous machines to be used as a single distributed parallel processor. PVM was developed by the University of Tennessee, The Oak Ridge National Laboratory and the Emory University. 2. The intermediate language used by the Gambit compiler for Scheme.
  • parliamentary government — government by a body of cabinet ministers who are chosen from and responsible to the legislature and act as advisers to a nominal chief of state.
  • particulate fluidization — Particulate fluidization is a condition when particles in a fluidized bed are individually suspended.
  • passive balance of trade — a negative balance of trade
  • people's liberation army — See under Huk (def 1).
  • permeability coefficient — the volume of an incompressible fluid that will flow in unit time through a unit cube of a porous substance across which a unit pressure difference is maintained
  • phosphorus sesquisulfide — (not in scientific use) a yellow, crystalline, flammable substance, P 4 S 3 , insoluble in cold water and decomposed by hot water: used chiefly in organic synthesis and in the manufacture of matches.
  • photomechanical transfer — a method of producing photographic prints or offset printing plates from paper negatives by a chemical transfer process rather than by exposure to light
  • physiological atmosphere — ecosphere.
  • plantation walking horse — one of a breed of saddle horses developed largely from Standardbred and Morgan stock.
  • pluck sth out of the air — If you say that someone plucks a figure, name, or date out of the air, you mean that they say it without thinking much about it before they speak.
  • polish people's republic — former name of Poland.
  • polychlorinated biphenyl — PCB.
  • polymer matrix composite — A polymer matrix composite is a material consisting of a composite made stronger by adding fibers or particles to it.
  • port address translation — (networking)   (PAT) A function provided by some routers which allows hosts on a LAN to communicate with the rest of a network (such as the Internet) without revealing their own private IP address. All outbound packets have their IP address translated to the routers external IP address. Replies come back to the router which then translates them back into the private IP address of the original host for final delivery. Compare SOCKS.
  • potassium cobaltinitrite — a yellow, crystalline, slightly water-soluble powder, K 3 Co(NO 2) 6 , used as a pigment in oil and watercolor paints, and for coloring surfaces of glass, porcelain, etc.
  • potentiometric titration — titration in which the end point is determined by measuring the voltage of an electric current of given amperage passed through the solution.
  • prairie button snakeroot — a stout composite plant, Liatris pycnostachya, of prairies in the central U.S., having showy, rose-purple flower heads in dense spikes.
  • pre-emptive multitasking — (operating system, parallel)   A type of multitasking where the scheduler can interrupt and suspend ("swap out") the currently running task in order to start or continue running ("swap in") another task. The tasks under pre-emptive multitasking can be written as though they were the only task and the scheduler decides when to swap them. The scheduler must ensure that when swapping tasks, sufficient state is saved and restored that tasks do not interfere. The length of time for which a process runs is known as its "time slice" and may depend on the task's priority or its use of resources such as memory and I/O. This contrasts with cooperative multitasking where each task must include calls to allow it to be descheduled periodically.
  • preparatory to doing sth — If one action is done preparatory to another, it is done before the other action, usually as preparation for it.
  • presumption of innocence — the rebuttable presumption of the innocence of the defendant in a criminal action in Anglo-Saxon jurisprudence, placing upon the prosecution the burden of proof of the defendant's guilt.
  • pretty amazing new stuff — (humour, communications)   (PANS) What PSTN is evolving into.
  • principal quantum number — the nonnegative, integral quantum number that defines the stationary orbits in the Bohr model of the atom.
  • private health insurance — insurance against the need for medical treatment as a private patient
  • private-key cryptography — (cryptography)   As opposed to public-key cryptography, a cryptographic method in which the same key is used to encrypt and decrypt the message. Private-key algorithms include the obsolescent Data Encryption Standard (DES), triple-DES (3DES), the Advanced Encryption Standard (AES), also known as Rijndael, Blowfish, Twofish RC2, RC4, RC5 and RC6. A problem with private-key cryptography is that the sender and the recipient of the message must agree on a common key via some alternative secure channel.
  • privileged communication — a communication that one cannot legally be compelled to divulge, as that to a lawyer from a client
  • professional association — a body of persons engaged in the same profession, formed usually to control entry into the profession, maintain standards, and represent the profession in discussions with other bodies
  • professional corporation — a corporation formed by one or more licensed practitioners, especially medical or legal, to operate their practices on a corporate plan. Abbreviation: PC, P.C.
  • professional programming — paranoid programming
  • program information file — (file format)   Under Windows, a file providing information on how a non-Windows application program should be run, including how much memory should be allocated to it and what graphics interface it requires.
  • programmable array logic — (hardware)   (PAL) A family of fuse-programmable logic integrated circuits originally developed by MMI. Registered or combinatorial output functions are modelled in a sum of products form. Each output is a sum (logical or) of a fixed number of products (logical and) of the input signals. This structure is well suited for automatic generation of programming patterns by logic compilers. PAL devices are programmed by blowing the fuses permanently using overvoltage. Today, more complex devices based on the same original architecture are available (CPLD's for Complex PLD's) that incorporate the equivalent of several original PAL chips. PAL chips are, however, still popular due to their high speed.
  • progressive assimilation — assimilation in which a preceding sound has an effect on a following one, as in shortening captain to cap'm rather than cap'n.
  • progressive conservative — a member of the Progressive Conservative party of Canada.
  • psychopathic personality — an antisocial personality characterized by the failure to develop any sense of moral responsibility and the capability of performing violent or antisocial acts
  • public international law — Also called public law. the law governing the legal relations between independent states or nations and, increasingly, between these and individuals.
  • public relations officer — a person who is responsible for communications with the public
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