• comp.cad.autocad (newsgroup)
• comp.cad.cadence (newsgroup)
• comp.cad.compass (newsgroup)
• comp.cad.i-deas (newsgroup)
• comp.cad.microstation (category)
• comp.cad.pro-engineer (newsgroup)
• comp.cad.solidworks (newsgroup)
• comp.cad.synthesis (newsgroup)