Could one write a Spotlight-Plugin that does something of the kind? Sure, but the original poster complained that doing the search was too brute-force. Other solutions that simply re-arrange the brute-forceness (probably not a word, but hey, it's early in the morning) don't address the core issue. This is not a cheap operation. That said, outside of file system analysis tools, I've never had a reason to ever want to do this in my 30+ years of Unix programming. Craig