What is PDF?? How can I create a PDF ??

On the Mac OS you can turn any document into a PDF by going through the Print menu, but I'm guessing you're on a Windows PC? I don't know how to do it on Windows, unless it's with an additional program.

you need Acrobat Writer but it isn't free. CutePDF Writer must be a free pdf writer but I never use it

PDF stands for portable Document file and is popular on the web because it allows documents to be shared, always looking the same no matter what computer you are viewing them on. The are also very difficult to alter which is good for copyright and accuracy. TO create a PDF you will need special software like Adobe Distiller or the Full version of Adobe Acrobat (not just acrobat reader). To view PDFs you need to install the free acrobat view which is available for free to download from the adobe website