[quadstick]

The original post may have been intended for a select audience that would be familiar with the context, so that author may be forgiven, but the person that submitted the post should have kept in mind the much wider audience here.

As a hardware engineer, ETL is a NRTL that competes with UL and CSA. Oh, excuse me, Thomas Edison's Electrical Testing Labs is a Nationally Recognized Testing Laboratory that competes with Underwriters Laboratories and the Canadian Standards Association.