I updated my "CarpHick" char picker web app thingy: You can now pick circled letters and numbers like ① and Ⓩ. When I was setting up CarpHick and looking over the Unicode spec to figure out which of the worlds' many symbols to list/omit, I thought "What on earth is an 'enclosed alphanumeric'? I dunno, so I bet I never use them. Guess I'll skip them." But it turns out they are thingies like ① and Ⓩ which I use a bunch during EnigMarch.