AutoCAD has a long history, and we go back all the way.  Our primary developer started using AutoCAD with version 1.0 on the original IBM PC with a 10mb hard drive and CGA graphics (now we have mp3 files larger than that).  Here is a detailed history, including corresponding drawing versions, .NET framework used, etc.

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You may have noticed that when you try to copy named objects in Civil3D (or use the same name) that it will append a (1) to the name.  What you might not have noticed is that if the string case of the named object varies, Civil3D will let you create what we consider to be a duplicated name !

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