Dick, thanks for sharing your presentation.
For future reference, while this was a PDF file, you can open PowerPoint with a free open source office suite called OpenOffice and it's brother suite LibreOffice.
In may ways (except for strict compatibility and some issues with very large documents) it's much better than the MS Office product.
http://www.openoffice.org/download/
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Igitur si vis pacem, para bellum -
- Therefore if you want peace, prepare for war.