29:4.18

2. Mechanical Controllers. These are the exceedingly versatile and mobile assistants of the associate power directors. Trillions upon trillions of them are commissioned in Ensa, your minor sector. These beings are called mechanical controllers because they are so completely dominated by their superiors, so fully subservient to the will of the associate power directors. Nevertheless they are, themselves, very intelligent, and their work, though mechanical and matter-of-fact in nature, is skillfully performed.