[sdeming]

void * is used all over the place.

Look at memcpy(), memset(), and many of the other string.h functions. Also look at libdl and the dlsym() functions that rely on void *'s.

When used to define the return value of a function, "void" simply means what everyone has said: "I will not be returning anything." The use of void as a return value is only one small part of why it exists though.