I'm not an expert in typefaces that serve scientific writing, but I'd guess that's another dozen or two.
Michael BierutIf you ask people in the US what logos they like and recognise, they'll name Target or Nike.
Michael BierutMost people have no idea how much goes into designing a typeface. Twenty-six letters in the alphabet, usually with two versions of each, upper and lower case. Punctuation and alternate characters and numbers - let's not forget numbers - can add another 40 or so.
Michael Bierut