I'm not an expert in typefaces that serve scientific writing, but I'd guess that's another dozen or two.
Michael BierutTarget for example, is just a dot with a circle around it, that's all it is, so if you want a logo like Target, you don't need to hire a designer, you barely need to know how to operate a computer program, the logo may as well be anything.
Michael BierutI think once the artistic world of the type designer merged with the scientific world of the computer programmer, you began to see this crossover.
Michael BierutThe studies I've seen about readability and legibility tend to focus on a specific set of metrics: size, not just the point size, but things like the size of the lower case letters as a proportion of the overall letter height, and line length. People simply can't read really small type set in really long lines.
Michael Bierut