Federal Communications Commission (FCC) NoticeWarning: This equipment generates, uses,and can radiate radio frequency energy and ifnot installed and used in accordance with theinstructions manual, may cause interferenceto radio communications. It has been testedand found to comply with the limits for aClass A computing device pursuant toSubpart J of Part 15 of FCC Rules, which aredesigned to provide reasonable protectionagainst such interference when operated in acommercial environment. Operation of thisequipment in a residential area is likely tocause interference in which case the user athis own expense will be required to takewhatever measures may be required tocorrect the interference.First Edition (April 1982)Use this publication only for the purpose stated in the Preface.Changes are periodically made to the information herein ; any such changes will be reported insubsequent revisions or Technical Newsletters.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 announcesuch IBM products, programming, or services in your country .Publications are not stocked at the address given below . Requests for copies of IBM publicationsshould be made to your IBM representative or the IBM branch office serving your locality .This publication could contain technical inaccuracies or typographical errors . A form for readers'comments is provided at the back of this publication . If the form has been removed, address yourcomments to IBM Corporation , Information Development , Department 27T, P.O. Box 1328 , BocaRaton, Florida 33432 . IBM may use and distribute any of the information you supply in anyway it believes appropriate without incurring any obl igation whatever. You may , of course ,continue to use the information you supply .© Copyright International Business Machines Corporation 1982