The exception to the no-apostrophes-in-plurals rule, as I understand it, is supposed to be for numbers and other cases where it might be confusing without the divider.
But what is the plural of Dr. (used as a title)? Clearly, no one at my kids' pediatricians' office knows, as they spelled it differently on each posted notice. They tried
- Dr.'s
- Drs.
- Drs
- Dr's
and I think there might have been another
(Why they didn't simply write Doctors I do not know.)
What is the correct form(s)?