Under that system there were just 2 types, Universal (the categories being combined) and International (or specialized)-where at a universal expo each country could build its own pavilion, but buildings could be provided for poorer countries.
Under that system there were just 2 types, Universal (the 1st and 2nd categories were combined) and International (or specialized). Under this system, each country could build its own pavilion at a universal expo, but buildings could be provided for poorer countries.