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`IBM DICTIONARY
`OF COMPUTING
`
`Compiled and edited by
`GEORGE McDANIEL
`
`McGRAW-HILL, INC.
`New York San Francisco Washington, D.C. Auckland Bogota
`Caracas Lisbon London Madrid Mexico City Milan
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`Sydney Tokyo Toronto
`
`
`
`Limitation of Liability
`.
`While the Editor and Publisher of this book have made reasonable efforts to
`ensure the accuracy and timeliness of the information contained herein, nei(cid:173)
`ther the Editor nor the Publisher shall have any liability with respect to loss or
`damage caused or alleged to be caused by reliance on any information con(cid:173)
`tained herein.
`
`Copyright© 1994 by International Business Machines Corporation. All rights
`reserved. Printed in the United States of America. Except as permitted under
`the United States Copyright Act of 1976, no part of this publication may be
`reproduced or distributed in any form or by any means, or stored in a data
`. base or retrieval system, without the prior written permisssion of the pub~
`lisher.
`
`1 2 3 4 5 6 7 8 9 0 DOC/DOC 9 9 8 7 6 5 4 3
`
`ISBN 0-07-031488-8 (HC)
`ISBN 0-07-031489-6 (PBK)
`
`The sponsoring editor for this book was Daniel A. Gonneau and the
`production supervisor was Thomas G. Kowalczyk.
`
`Printed and bound by R. R. Donnelley & Sons Company.
`
`Tenth .Edition (August 1993)
`This is a major revision of the IBM Dictionary of Computing, SC20-1699-8,
`which is made obsolete by this edition. Changes are made periodically to the
`information provided herein.
`It is possible that this material may contain reference to, or information about,
`IBM products (machines and programs), programming, or services that are
`not announced in your country. Such references or information must not be
`construed to mean that IBM intends to announce such IBM products, pro(cid:173)
`gramming, or services in your country. Comments may be addressed to IBM
`Corporation, Department E37/656, P. 0. Box 12195, Research Triangle Park,
`NC27709.
`
`International Edition
`Copyright© 1994 by International Business Machines Corporation. Exclusive
`rights by McGraw-Hill, Inc. for manufacture and export. This book cannot be
`re-exported from the country to which it is consigned by McGraw-Hill. The
`International Edition is not available in North America.
`When ordering this title, use ISBN 0-07-113383-6.
`
`This book is printed on acid-free paper.
`
`
`
`store support procedure
`
`[654]
`
`string constant
`
`matching a protection key associated with a store ref(cid:173)
`erence to main storage with a storage key associated
`with each block of main storage. See also fetch pro(cid:173)
`tection.
`
`store support procedure A procedure that assists
`personnel in administrative, operational, and manage(cid:173)
`rial operations apart from customer checkout.
`
`store through cache In a processing unit, a store
`(write) operation, in which data are immediately put
`into both cache and main storage locations.
`
`storing (1) The action of placing data into a storage
`(2) To place data into a storage device.
`device.
`(3) To retain data in a storage device. (T)
`
`storyboard In multimedia applications, a visual repre(cid:173)
`sentation of the script, showing a picture of each scene
`and describing its corresponding audio. Synonymous
`with slide show presentation.
`
`storyboarding In multimedia applications, producing
`a sequence of still images, such as titles, graphics, and
`images, to work out the visual details of a script.
`
`STP Stop character.
`
`STR Synchronous transmitter receiver.
`
`straight line coding (1) A set of instructions without
`(I)
`(A)
`(2) Programming technique in
`loops.
`which loops are avoided by unwinding. (I)
`(A)
`
`stratified language (1) A language that cannot be
`used as
`its own metalanguage;
`for example,
`FORTRAN. (I)
`(A)
`(2) Contrast with unstratified
`language.
`
`streak A narrow area on a printed sheet that is either
`darker or lighter than desired. Contrast with gray bar,
`spot.
`
`stream (1) To send data from one device to another.
`(2) See data stream.
`
`stream data transmission In PLII, the transmission
`of data in which the organization of the data into
`records is ignored and the data is treated as though it
`were a continuous stream of individual data values in
`character form.
`Contrast with record data trans(cid:173)
`mission.
`
`stream editor In text processing, a text editor that
`treats the entire text as a single string, even when the
`string
`is
`broken
`into
`lines
`for
`viewing
`purposes. (T)
`(A)
`
`streamer Synonym for streaming tape drive.
`
`stream file In BASIC, a file on disk in which data is
`read and written in consecutive fields without record
`boundaries. Contrast with record file.
`
`streaming (1) A condition in which a device remains
`in a transmit state for an abnormal length of time.
`(2) A method of writing and reading data on magnetic
`tape as continuous fields without record boundaries.
`
`streaming tape drive A magnetic tape unit especially
`designed to make a nonstop dump or restore of mag(cid:173)
`netic disks without stopping at interblock gaps. Syn(cid:173)
`onymous with streamer. (T) Contrast with start-stop
`tape drive.
`
`streaming tape recording A method of recording on
`magnetic tape that maintains continuous tape motion
`without the requirement to start and stop within the
`interrecord gap. (A)
`
`stream mode A method of sending and receiving data
`in which records are defined as a stream of data
`without boundaries.
`
`strength member In an optical cable, material that
`can be located either centrally or peripherally and that
`functions as a strain relief.
`
`stress patterns In printing,
`severe print-quality
`standard patterns used to test print quality.
`
`strict type checking In C language, checking data
`types for compliance with the rules of C language
`more strictly than C compiler checking.
`
`strike In videotaping, to clear away, remove, or dis(cid:173)
`mantle anything on the set.
`
`strikeover A character entered in a space currently
`occupied by another character.
`
`string (1) A sequence of elements of the same nature,
`such as characters considered as a whole. (T)
`(2) In
`programming languages, the form of data used for
`storing and manipulating text.
`(3) In XL Pascal, an
`object of the predefined type STRING.
`(4) In the
`AS/400 system, a group of auxiliary storage devices
`connected in a series on the system. The order and
`location in which each device is connected to the
`system determines the physical address of the device.
`(5) In PL/I, a sequence of characters or bits that is
`treated as a single data item. (6) In SQL, a character
`string.
`(7) See alphabetic string, binary element
`string, bit string, character string, compound string,
`conformant string, literal string, mixed string, null
`string, pattern string, symbol string, text string, unit
`string.
`
`string constant In Pascal, a string whose value is
`fixed by the compiler.
`
`