In a recent thread, it was asked why this forum has no menu option to insert symbols while other forums do. The question was never addressed but alternatives were suggested like Windows Character Map and looking up "alt" codes to make the desired character appear. If you've ever looked at...
Unfortunately, that symbol is not in your map (yes, I see the degrees symbol that is possibly part of it)
The 'N', small circle or 'o' and the underline below the 'o' are all part of one character as in not seperate bits, so I was hoping to find where it exists as a whole rather than having to make it up if I wanted to use it (other than copy & paste).
I found the 'codes' for it:
alt 8470
or
u+2116
but as in a previous thread on the forum, typing those gives anything but the wanted thing (one gives a square box and the other -> D).
I found the codes too but as you point out, they don't work on the forum. In Visitor's thread I posted my own version of his page with copy keys on it. I keep this open in a tab so I can quickly get any obscure characters. I've added the № character and have attached it here (but had to change the extension from html to txt - just change it back). If you open it in an editor, the third lot of data (starting var data3 = [ "Inter IC","I²C", etc.) is the third (mainly unused) table so you can add any symbols you wish to it.