On Careers 2.0, the Technologies field for an education has the hint
A list of up to 10 core technologies you studied.
Problem is, the field is limited to 100 characters. Sadly, it's hard to fit 10 tags into that when one has tags like functional-programming, discrete-mathematics and operating-system as being quite relevant to one's studies.
It'd be super if the field size got upped a bit, so one can have 10 tags, even when using large tags like those.