A circle in the middle of the section is sometimes read with the letter “S” when handwritten. One of my mathematics professors similarly denoted a chapter as a C but with the circle on the middle of the C on the left side. Just use it myself to make notes. I am going to get some of it as soon as possible in my own name. I found this SE thread by searching to see if this is a standard symbol or if he just invented it.

Though I think it looks good it doesn’t make as much sense to use it on a C, since the original symbol is a digraph of two S. Would one make a sufficient digraph of stacked..? I don’t think that the section symbol would flow to the whole system

though. As I say, I don’t think the section symbol would flow too well if I were the only one.