Daddy, what does "CC:" mean?

Danny O'Brien posted an entry I didn't understand until I thought really hard about it.

He wrote: "One more thing I'm going to have problems explaining to my daughter: what 'cc:' stands for."

The first time I read that, I though, "Huh? Does he think they won't have email in the future?"

Then I realized what he meant. "CC:" stands for "carbon copy". I'd almost forgotten about those damn things! I'm 23, and I barely remember carbon paper. Danny's daughter is going to have a difficult time with this concept...