License AgreementThis work is copyright Ian Parberry. All rights reserved. The author offers this work, retail value US$20,free of charge under the following conditions:

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If you wish to provide access to this work in either print or electronic form, you may do so byproviding a link to, and/or listing the URL for the online version of this license agreement:http://hercule.csci.unt.edu/ian/books/free/license.html. You may not link directly to the PDF file.

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All printed versions of any or all parts of this work must include this license agreement. Receipt ofa printed copy of this work implies acceptance of the terms of this license agreement. If you havereceived a printed copy of this work and do not accept the terms of this license agreement, pleasedestroy your copy by having it recycled in the most appropriate manner available to you.

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You undertake to donate a reasonable amount of your time or money to the charity of your choiceas soon as your personal circumstances allow you to do so. The author requests that you make acash donation to The National Multiple Sclerosis Society in the following amount for each workthat you receive:

$5 if you are a student,❍

$10 if you are a faculty member of a college, university, or school,❍

$20 if you are employed full-time in the computer industry.❍

Faculty, if you wish to use this work in your classroom, you are requested to:

encourage your students to make individual donations, or❍

make a lump-sum donation on behalf of your class.❍

If you have a credit card, you may place your donation online athttps://www.nationalmssociety.org/donate/donate.asp. Otherwise, donations may be sent to:

National Multiple Sclerosis Society - Lone Star Chapter8111 North Stadium DriveHouston, Texas 77054

If you restrict your donation to the National MS Society's targeted research campaign, 100% ofyour money will be directed to fund the latest research to find a cure for MS.

For the story of Ian Parberry's experience with Multiple Sclerosis, seehttp://www.thirdhemisphere.com/ms.

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