Somedays computing technology seems like a collection of very fine threads with a lot depending on them. I don’t suppose there ever was a time where ordinary folk could really understand much. But when I started using macs around system 7.1 I was under the illusion that it might be something I could grasp if not master. I now feel like I am at one end of a multitude of dependencies, with no change of a glimpse of the root of any.