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CADTutor provides free video tutorials, articles, downloads and a busy community forum for users of AutoCAD and associated software.

WikiAnswers: Questions and Answers from the Community

University of Wisconsin-Eau Claire's source for official information

The Adobe Acrobat User Community is a global resource for users of Acrobat and PDF, with free eseminars, tips, tutorials, videos and discussion forums.

PDF Editor to replace Adobe Acrobat: Create, Fill, Save, Delete, Submit, Reset PDF Form. Insert Text, Image, URL, Whiteout, Highlight, Drawing, Commenting, Action and Bookmark into PDF. Scan paper form into PDF. International language Support. Cre...