Not really: ARPANET was the predecessor to NSFNET (which, in retrospect, means the original post of "Fourteen years" was approximately correct, even for me :p - since the Internet proper didn't come online until the mid-'90s) and was phased out node-by-node after NSFNET was brought online.
In this case, using all-caps is correct since ARPANET is an acronym for Advanced Research Projects Agency Network.
ACE still stands for nothing, however.:D
You are....... an oldie in the Internet :p
I'm only 26, and I first went online in 1995 when the first Internet Cafe (iCafe) appeared in the Philippines, which was by then, our country was still a "subscriber" to AT&T.
I played my first online game in 1996/1997 - MUDs - AnsalonMUD to be exact. Then DSL - Dark & Shatterred Lands.