...it's a tightly held secret, I will say that we have not ruled out using an "A" as our next alphabetic prefix. We have had extensive meetings to discuss other letters, but have failed to come to a consensus. We almost agreed on the "C" at one point, but as Spragg pointed out, people might think that stands for "chip" and question the previous listings.

We have also considered a departure from the Latin alphabet to use symbols from either the Mandarin or Vulcan alphabets, but ultimately we decided to wait until a milestone edition for that (hint: you're not gonna want to miss the 20th edition!)