This answer on Stackoverflow explains it: http://stackoverflow.com/a/401999/8954

kyberias · on May 17, 2012

Sorry, no, it doesn't explain it at all! I already know COM+ is delivered on Windows 2000 and above. But the TPC benchmark table talks about AIX, which is a Unix, not Windows! Why do they say AIX, not Windows if they're running COM+?

DrJokepu · on May 17, 2012

"In fact, it's usually used as the TP monitor in TPC-C benchmark systems because it's more efficient than .Net or Java and much cheaper than Tuxedo or Encina (which reduces the $/TPM)."

kyberias · on May 18, 2012

So are they running Windows boxes but it's nowhere to be seen? Only AIX is mentioned.