"functions" - key terms from Wikipedia

analytic functions
autonomous ego functions
basis functions
bessel functions
cognitive functions
color matching functions
complex analytic functions
complex functions
continuous functions
coordinate functions
correlation functions
cryptographic hash functions
density functions
dmv functions
elementary functions
enzyme functions
executive functions
functions
functions	and duties
gaussian functions
generic functions
hankel functions
hash functions
holomorphic functions
hyperbolic functions
inline functions
integrable functions
inverse trigonometric functions
judicial functions
kernel functions
language functions
library functions
member functions
ot functions
procedures and functions
real analytic functions
regular functions
schwartz functions
sha hash functions
shadow functions
sine and cosine functions
spherical bessel functions
spherical harmonic functions
string functions
transformation functions
trigonometric functions
two functions
utility functions
wave functions
working memory functions