Yes, they are very similar and made by the same manufacturer, Iomega. They are, however not plastic like the Zip disks which are based off of floppy technology I believe.

I was really impressed with their reflectivity.

UofI? UC campus? Now I'm wondering where my Mg came from! <img src="/images/graemlins/wink.gif" alt="" /> Some lab scraps? *grins*
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Experience is a hard teacher because she gives the test first, the lesson afterwards.