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.\" Copyright 1989 AT&T
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Copyright 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T
Copyright 1986, 1987, 1988, 1989 Sun Microsystems, Inc.
Copyright 1985 Regents of the University of California
All Rights Reserved
Printed in USA
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No part of this publication may be reproduced or transmitted in any form
or by any means--graphic, electronic, electrical, mechanical, or
chemical, including photocopying, recording in any medium, taping,
by any computer or information storage and retrieval systems, etc.,
without prior permissions in writing from AT&T.
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ACKNOWLEDGEMENT
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AT&T gratefully acknowledges the X/Open Company Limited for permission
to reproduce portions of its copyrighted \f2X/Open Portability Guide, Issue 3\f1.
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IMPORTANT NOTE TO USERS
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While every effort has been made to ensure the accuracy of all
information in this document, AT&T assumes no liability to any party for any loss or
damage caused by errors or omissions or by statements of any kind in this
document, its updates, supplements, or special editions, whether such errors
are omissions or statements resulting from negligence, accident, or any
other cause. AT&T further assumes no liability arising out of the
application or use of any product or system described herein; nor any
liability for incidental or consequential damages arising from the use of this
document. AT&T disclaims all warranties regarding the information
contained herein, whether expressed, implied or statutory, \f2including
implied warranties of merchantability or fitness for a particular
purpose\f1.
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AT&T makes no representation that the interconnection of products in the
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patent rights, nor do the descriptions contained herein imply the granting or license
to make, use or sell equipment constructed in accordance with this description.
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AT&T reserves the right to make changes without further notice to
any products herein to improve reliability, function, or design.
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TRADEMARKS
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IBM System/370 is a registered trademark of International Business Machines.
PDP-11/45 and VAX-11/750 are registered trademarks of Digital Equipment 
Corporation.
UNIX is a registered trademark of AT&T.
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