Used by the Microsoft Research (MSR) Internet Services Research Center (ISRC) to analyze the web for Microsoft's Search and Ads services. Note: the “ISRC” in “MSR-ISRCCrawler” does not stand for International Standard Recording Code.
http://research.microsoft.com/en-us/um/redmond/projects/msr-isrccrawler/msr-isrccrawler.htm