Microsoft Pmss
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`Cplmnlter
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`Iblctlonalry
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`Third Edition
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`Apple v. Realtime
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`PPPPPPPPPP
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`1
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`Apple v. Realtime
`Proceeding No. IPR2016-01738
`APPLE 1043
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`PUBLISHED BY
`Microsoft Press
`A Division of Microsoft Corporation
`
`One Microsoft Way
`Redmond. Washington 98052-6399
`
`Copyright © 1997 by Microsoft Corporation
`
`All rights reserved. No part of the contents of this book may be reproduced or transmitted
`in any form or by any means without the written permission of the publisher.
`
`Library of Congress Cataloging-in-Publication Data
`Microsoft Press Computer Dictionary. —— 3rd ed.
`p.
`cm.
`ISBN 1—57231—446—X
`
`1. Computers—Dictionaries.
`1. Microsoft Press.
`
`2. Microcomputers—-Dictionaries.
`
`QA76.15.M54 1997
`004'.03--dc21
`
`‘
`
`97-15489
`
`ClP
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`Printed and bound in the United States of America.
`
`6789 QMQM 2109
`
`Distributed to the book trade in Canada by Macmillan of Canada, a division of Canada Publishing
`Corporation.
`
`A CIP catalogue record for this book is available from the British Library.
`
`'
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`Microsoft Press books are available through booksellers and distributors worldwide. For further
`information about international editions, contact your local Microsoft Corporation office. Or contact
`Mlcrosoft Press International directly at fax (425) 936-7329.
`
`Macintosh, Power Macintosh, QuickTime, and TrueType are registered trademarks of Apple Compuw“
`Inc. Intel is a registered trademark of Intel Corporation. DirectInput, DirectX, Microsoft, Microsoft
`Press, MS-DOS, Visual Basic, Visual C++, Win32, Win325, Windows, Windows NT, and XENIX are
`registered trademarks and ActiveMovie, ActiveX, and Visual J++ are trademarks of Microsoft
`COYPOration. Java is a trademark of Sun Microsystems, Inc. Other product and company names
`mentioned herein may be the trademarks of their respective owners.
`
`Acquisitions Editor: Kim Fryer
`Project Editor: Maureen Williams Zimmerman, Anne Taussig
`Technical Editors: Dail Magee Jr., Gary Nelson, Jean Ross, Jim Fuchs, John Conrow, Kurt Meyer,
`Robert Lyon, Roslyn Lutsch
`if
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`2
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`disk’
`head-per-track disk drive \hed‘por—trak‘
`driv\ n. A disk drive that has one read/write head
`
`for every data track. Such a disk drive has a very
`low seek time because the heads do not have to
`move across the disk surface to the required track
`for reading and writing Because read/write heads
`are expensive, this type of drive is uncommon.
`head positioning \hed’ pa—zish‘a-néng\ n. The
`process of moving the read/write head of a disk
`drive to the proper track for reading and writing.
`head slot \hed‘ slot\
`71. The oblong opening in
`the jacket of a floppy disk that provides access to
`the magnetic surface of the disk for the read/write
`head. See the illustration.
`
`Head slot
`
`Head slot
`
`I
`
`The head slots on a 5.25-inch disk
`5-inch disk (bottom). (The metal
`inch disk has been pulled back
`
`Head slot.
`
`(top) and a 3.
`shutter on the 3.5-
`to show the head slot.)
`
`ill The process
`ing \hed’ swich‘éng\
`head switch
`g among multiple read/
`of electrically switchin
`write heads in a disk drive.
`heap \liép\ n. 1. A portion of memory t'eseiVed for
`a program to use for the temporary storage of data
`structures whose existence or size cannot be
`
`r
`
`[M
`
`lectrical signals and vice Versa Disk
`changing 6'
`drive“ usually contain one head for each surface
`that can be read from and written [0,
`head arm \hed’ arm\ 11. See access arm
`,,
`head-cleaning device \hed’kle-néng dg_xrfs‘\
`paratus for applying a small amount of
`An up
`eaning fluid to a magnetic head to remove accu-
`c1
`mulated debris.
`head ““511 \hed’ krash\ n. A hard disk failure in
`which a read/write head, normally supported on a
`cushion of air only millionths of an inch thick,
`comes into contact with the platter, damaging the
`magnetic coating in which data is recorded. Still
`more damage occurs when the head picks up
`material gouged out of the surface and pushes it.
`A head crash can be caused by mechanical failure
`or by heavy shaking of the disk drive. If the crash
`occurs on a directory track, the whole disk may
`become instantly unreadable.
`header \hed’ar\ n. 1. In word processing or print—
`ing, text that is to appear at the top of pages. A
`header might be specified for the first page, all
`pages after the first, even pages, or odd pages. It
`usually includes the page number and may also
`show the date or the title or other information
`about a document. A150 called heading, running
`head. Compare footer. 2. An information structure
`that precedes and identifies the information that
`follows, such as a block of bytes in communica—
`tions,
`21 file on a disk, a set of records in a data—
`base, or an executable program. 3. One or more
`lines in a program that identify and describe for
`human readers the program, function, or proce—
`dure that follows.
`header file \hed’ar fil‘\ n. A file that is identified
`to be included at the beginning of a program in a
`language such as C and that contains the defini-
`tions of data types and declarations of variables
`used by the functions in the program.
`header label \hed’ar la‘bal\ n. An initial struc~
`””67 SUCh as an opening record,
`in the linear
`Organization of a file or communication that
`describes the length,
`type, and structure of the
`data that follows. Compare trailer label
`(defini—
`tion 1),
`n. The
`first
`
`rek‘ard\
`header record \hed’ar
`rEcord in a sequence of records.
`heading \hed’eng\ 71. See header (definition 1).
`
`“
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`22!
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