Most of them. I use a toilet every day and have no idea how it works except for I push the button and my shit goes away.
Consumer computer use is pretty stagnant I'd say. Click the icon of the program you want on the desktop. Read/watch some things, click some things, scroll a bit.
30 years ago a toilet needed 5 gallons and would clog if you used more than 12 inches of toilet paper.
I think you owe it to this forum to provide a citation.
and press it again if it doesn't flush enough.. just like the old ones :)