I had to look it up because of your comment. It's been over a decade since I dealt with anything in the AP Style Guide or adjacent. Fortunately, you are correct.

There's some mentioning of things going downwards here: https://en.wikipedia.org/wiki/The_Diamond_Age, like simple machines for the masses where the buttons are moving pictograms of what happens when that thing is pressed... Where on the other side, there's nanomachines built by the educated.