.cdr is indeed a CorelDraw file. However, the .ai file extension belongs, I believe, to Adobe Illustrator which is also a vector graphics program.
For ways of opening .ai files when you don't have the required program try here:
http://weblogs.asp.net/jgalloway/arc...lustrator.aspx
Or possibly try Inkscape an open source vector graphics editor which is supposed to be able to import both .cdr and .ai.
http://inkscape.org/
@JG26 EZ = a very useful resource. Thank you for posting.
~S~