I've occasionally seen SO - Significant Other.

Cloying.

I'm always baffled trying to work out why people find the English language so difficult. Why does somebody want a hotel for the DH on the AC or CT w/ AC?

DH is short for 'duh'

Pausanias, there's often a touch of sarcasm is the use of DH. I continue to regret the lack of an emoticon for sarcasm.

Mimar --

I hope you're right, but I think it's more "sometimes" than "often."

P.

Even when I was (yes,happily for 90% of it!) married, I never would have referred to him as the "dear husband." Just seems kind of odd and quaint to me.

Perhaps I am too cynical...

There are also the DD and DS designations for son and daughter.