É difícil ter certeza, porque o nível de detalhes é escasso, mas uma série que conheço que atende ao seu critério é a Soul Rider série de Jack Chalker .
A introdução do livro 5 fornece uma boa descrição da série;
But only the wizards of World, those with the power, could command anything from those great machines, and they were as limited as always. None could again get into the great control rooms of the ancients nor speak directly to the tremendous thinking machines that ran everything automatically. The Gates themselves were almost an afterthought; they had been closed, and set to "outgoing," but they had been locked.
Nobody really knew how they worked, or how to use them, and the computers had been strictly limited by the ancients so that even if they possessed that knowledge they could neither release or reveal it.
