I personally favour the DSGB's symbols over the DSA's. However, whatever symbols we need should exist right now in fonts that are easily available.

The "A", "B" scheme is well and good. However, I feel that using letters for the numbers is confusing. Plus, those two symbols do not necessarily fit in well with other number symbols: 0123456789AB. We have other common schemes too, like "T" & "E" (ten and eleven), and X for "ten". Maybe we could look to the Greek and Cyrillic alphabets (which fit aesthetically with the Roman one quite well) for inspiration. So maybe Г & Э for ten and eleven (because they resemble "T" and "E", but AREN'T "T" and "E").

0123456789ГЭ

Or maybe beta (β) or sigma (Σ) for eleven; one looks like a "B" but is not, and one looks like an "E" but is not. And they both, again, fit in with the aesthetics of the other numbers relatively well. Maybe a capital delta for "ten" (Δ) because it does look a lot like "A". Or maybe a capital lambda (Λ) which also looks like "A".

0123456789ΔΣ

We could go down the DSA route and have symbols resembling X and H. Perhaps: Ж (for "X") and one of Π Њ И (for "H").

0123456789ЖИ

Could you guys live with any of these? I do think we should settle on, at the very least, common world-wide symbols for these two numbers which AREN'T just "A" and "B".

I've been pouring over my Unicode character map for some suitable symbols after seeing your post.

I don't like the idea of using Greek letters since they are used in mathematics and the chance for some future confusion is great enough to discount them.

Cyrillic though doesn't really have that problem (at least not for us - the Ukrainians and others may disagree). Anyway, I like this pair:

Ж - ten

П - eleven

I'm of the opinion that anything we choose should also be easy to write by hand. The symbol for eleven fits this criteria well as it doesn't require a lifting of the hand. It has a secondary benefit in that if someone starts to accidentally write '11' they can quickly correct the mistake by adding a line. The symbol for ten is a little less easy to write as it requires three separate strokes. We could however accept a different rendering by hand - much like with the lower case 'a'. You could write a normal 'X' but connect the two diagonals with a horizontal line at the bottom so that the character could be written without lifting (upper left to lower right; lower right across to lower left; lower left to upper right).

123456789ЖП

Is there a way that these (or whichever symbols we agree on) can be added to the compose message area? Otherwise we're going to be forever copying out of character maps...

On the other hand, we could apply to have two new glyphs of our own design added to Unicode .