Fun fact about ELO. It's natural to think that it is some kind of initialism, but in fact ELO doesn't stand for anything. It's the name of the guy who invented the system. https://en.wikipedia.org/wiki/Arpad_Elo
So don't say it "E.L.O." (unless you're talking about the band, I guess), say "ee-low"
So don't say it "E.L.O." (unless you're talking about the band, I guess), say "ee-low"