I still see a lot of people cc'd (literally) on Jive posts across communities we work on. They must know it stands for carbon copy, right? Blue/black inky paper that even your local state government has discontinued use of 20 years ago (ok, maybe 5 years).
But when Jive users talk to one another they might say, "would you at mention Sally on that". So my idea is we should use the @ sign. So instead of at the bottom of a post we write "cc Brooks Jordan " we write "@ Brooks Jordan ". Seems like the modern way to do.