Arcane

I think the word is 'arcane'. The inner workings of a computer are beyond me. I am the 'switch it on, point the mouse, stroke the keys' type of user. I can do some searching. I have even downloaded and uploaded things. (Yes I did put that picture of me sitting on the bookstack there all by myself. I thought that was pretty darn clever for a cat.)
BUT I do not understand computers. My BIL knows a great deal more. He took time out yesterday and he has this sulking animal limping along at present. What he did is beyond me. He brought up things on the screen that I have never seen before. He tells me this is telling him about the inner workings of the computer. I apparently have plenty of 'storage space' left on it so that is not a problem. It is never likely to be. I do not download music or movies. Dictionaries do not take up the same sort of space apparently. They are 'just words' according to some people. (I disagree strongly.)
Now, dear readers, do you understand the inner workings of these machines? Do you understand the inner workings of all the other things you use on a daily basis? Do you know how a power plant works, how it delivers the electricity that allows us to use the machines? You probably have far more idea than me.
I come to the conclusion that there is more and more I do not know.