DICTIONARY OF
`COMPUTING
`
`SIXTH EDITION
`
` ) 9600« i
`ic'ChaTondch
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`1
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`APPLE 1011
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`APPLE 1011
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`1
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`www.acblack.com
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`First published in Great Britain
`by Peter Collin Publishing1988
`This sixth edition published in 2010
`Fifth edition published 2004
`Reprinted 2008, 2009
`Fourth edition published 2002
`Third edition published 1998
`Secondedition published 1994
`
`A & C Black Publishers Ltd
`36 Soho Square, London W1D 3QY
`
`Copyright © §.M.H.Collin, 1988, 1994, 1998, 2002
`This edition copyright © A & C Black Publishers 2004, 2010
`
`All rights reserved. Nopart of this publication may
`be reproduced in any form or by any means withoutthe
`permission of the publishers.
`
`A CIP catalogue record for this book is available from the British Library.
`
`ISBN 978 1 408 1 2807 7
`
`A & C Black uses paper produced with elemental chlorine-free pulp,
`harvested from managedsustainable forests.
`
`Text typeset by A & C Black
`Printed and bound in Spain by GraphyCems.
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`2
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`2
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`233
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`normalised form
`
`non volatile memory /,nvn_,volotal
`nonlinear /non'linio/ adjective used to
`'mem(a9)ri/ noun a storage medium or
`describe an electronic circuit whose output
`memory that retains data even when the
`does not change linearly in proportion toits
`power has been switched off O Bubble
`input
`memory is a non-volatile storage. Also
`nonlinear video editing /nvnlinis
`called non volatile storage, non volatile
`'vidiou ,editin/ noun a methodofediting a
`store
`video sequence in which the videois digi-
`access
`random
`non-volatile
`tised and stored in a computer andthe editor
`memory /,non ,volotail reendom ,ekses
`can then cut and move frames in any order
`'mem(a)ri/ noun full form of NVRAM
`before outputting the finished sequence
`non volatile storage /,non_,volotail
`(NOTE: The finished sequence can either
`'sto:rid3/, non volatile store noun sameas
`be produced directly from the computer
`non volatile memory
`output — thoughthis is normally at a lower
`‘pp m
`no-op
`instruction /nov
`quality than the original because of
`StrAkf(a)n/, no op /,nou 'pp/ noun an
`compression losses — or the computer can
`instruction that does not carry out any func-
`output time code instructions that can be
`tions but increments the program counter
`used to edit the original videotape.)
`no parity /,nou 'pzrati/ noun data trans-
`/non
`non maskable
`interrupt
`mission which doesnotuse a parity bit
`marskab(9)l
`'mntorapt/ noun a_ high
`NOR function /'no:r ,fankfan/ noun a
`priority interrupt
`signal
`that cannot be
`logical function whose output
`is false if
`blocked and overrides all other commands.
`either input is true
`Abbr NMI
`COMMENT: The output is 1 only if both inputs
`nonmodal/non'moud(s)I/ adjective (in a
`are 0; if the two inputs are different orif both
`GUN) displaying a windowbutstill allowing
`are 1, the outputis 0.
`a user to access other windowsthat are on-
`NOR gate /'no:r geit/ noun an electric
`screen before closing the nonmodal window
`circuit or chip which performs a NOR func-
`non
`operable
`instruction /,non
`tion
`/'no:m(9)l/ adjective usual or
`normal
`,Dp(e)rab(a)l in'strakfan/ noun aninstruc-
`which happens regularly O The normal
`tion that does not carry out any function, but
`procedure isfor backup copies to be made at
`increments the program counter
`the end of each day’s work.
`nonprinting code /,nonprintin 'koud/
`normal form /'no:m(e)l fo:m/ noun a
`plural noun a code that represents an action
`methodofstructuring information in a data-
`of the printer rather than a printed character
`base to avoid redundancy and improve
`O The line width can be set using oneof the
`storage efficiency
`non-printing codes, .LW, then a number.
`normalformat /'no:m(e)1 ,fozmzet/ noun
`non-procedural
`language /novn pro
`a standardised format for data storage
`\sird3(a)ral ‘lengwid3/ noun a program-
`normalisation
`/no:molar'zerf(a)n/,
`ming language which doesnot executestate-
`normalization noun the process of normal-
`ments one after anotheror call subroutines,
`ising data
`but instead defines a set of facts that can be
`/,no:molar
`routine
`normalisation
`queried
`'ze1f(a)n ru:,tizn/ noun a routine that
`nonrepudiation /,nonri,pju:di'e1f(o)n/
`normalises a floating point number and adds
`noun the ability of the person whoreceives a
`extra, noisy digits in the least significant
`messageto identify its sender, especially by
`position
`means of
`the digital
`signature on the
`normalise /'no:molaiz/, normalize verb
`message
`1. to convert data into a form which can be
`non-return to zero /non ri,ts:n to
`read by a particular computer system 2. to
`'zIarou/ noun a representation of binary
`convert characters into just capitals or into
`data in which the signal changes when the
`just a lowercase form 3. to store and repre-
`data changes state, and does not return to
`sent numbers in a pre-agreed form, usually
`zero volts after each bit of data. Abbr NRZ
`to provide maximum precision O All the new
`non scrollable /,non_
`'skroulob(o)l/
`data has been normalised to 10 decimal
`places. (NOTE: normalises — normalising
`adjective used to describe part of the screen
`— normalised)
`display which is always displayed (NOTE:In
`normalised form /'no:molarzd form/
`a WPthe text can scroll while instructions
`are non scrollable.)
`nounafloating point numberthat has been
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`3
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