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• CATIA   - CAD/CAM/CAE product line by Dassault Systemes.

• CADAM Drafting - Information about the 2d drafting solution within the CATIA product family from Dassault Systems.
• CATIA IUA Functions by EMA - Customization and extension functions for CATIA, with free download of some examples.
• CATIA Operators Exchange - COE is dedicated to the exchange of information about CATIA and other Dassault Systèmes software products.
• CATIA Users of Central Ontario - Volunteer organization serving the needs of CATIA users. Hints and Tips for users as well as minutes of meetings and notices of upcoming events.
• Catia V5 Users Group - Mailing list dedicated to helping users with the Catia family of work benches.
• Catiaworld.com - An independent resource for CATIA and other CAD/CAM software by Dassault. Offers business listings for engineering, hardware, software, and recruitment, with more information for registered users.
• IBM Engineering Solutions / CATIA - CATIA is marketed worldwide by IBM.
• Practical Catia - Catia training and job listings involving CATIA CAD/CAM/CAE skills.
• Rainer Sieber CAE Systems - Voltool is a supplementary product (IUA) for easier and faster work in surface design and topology handling with CATIA V4.