It's too much work to refer to our site each time with the formal name of Unix and Linux Stack Exchange, so we tend to shorten it. I have so far seen 4 ways of doing so:

  • unix.SE - This seems to me more commonly-known but there is an existing site with that exact url; even if there wasn't, .se is a top-level domain.
  • unix.SX - Gets rid of the existing site problem, but .sx still looks a top-level doman (we don't have them all memorised)
  • UL - Ummm... too much little info (who would guess?), but at least it covers the L part of the site.
  • unix-SE - Gets rid of the is this a url question, and we get to keep the more common se thing, instead of now having to get used to the sx thing.

You can easily guess which one I'd go with.

1 Answer 1


SE is the usual abbreviation for Stack Exchange as a whole. “SEI” is the common abbreviation for Stack Exchange, Inc. (the company); nobody uses “SXI”.

.sx is likely to become a TLD soon, so it's not really better than .se.

I sometimes use U&L when the context makes an SE site name reasonably expected and I expect readers to be familiar with the existing sites (otherwise Unix needs to be spelled out, and sometimes even Linux).

Although domain names are case-insensitive, they are almost always written in lowercase, so I think “Unix.SE” or “unix.SE” are sufficiently unambiguous. Not that there's much of a risk of confusion with “unix.se” anyway.


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