[virtualwhys]

Hah, the relief! That was driving me crazy, thank you for clarifying the usage. I've only seen it written and blindly assumed "spa", not S-P-A.

Now I can read SPA posts without cringing...

[edwardhusarcik]

Lol keep in mind I could be completely wrong! It seems like there isn't a definitive rule. :(

[virtualwhys]

No, it makes sense, although as you say there's no rule, so some will use "SPA" and others "S-P-A".

I'm reading it as "an S-P-A" now and it feels so, so much better :)