PDF files have the option to let you share and comment on documents in a wide range of applications. Adobe Acrobat Reader and other free PDF programs offer a subset of the capabilities of the paid ...
Don't dread clicking PDF links. Make it better with PDFMeNot, a free service that turns those PDFs into simple Flash documents. Josh Lowensohn joined CNET in 2006 and now covers Apple. Before that, ...
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