Reminds me of QA at Yahoo! Japan. They make sure that every page that is going to be released is capable of showing the EMG1, EMG2, and EMG3 tags.

Here is a screenshot of EMG1 and EMG2 both being shown at the same time, it was the first time for me to see more than one shown at the same time in production.

http://i.imgur.com/mZxyA.png

I forget what EMG3 is used for.