History monoid
A history monoid is like a special toy box that helps people who work with computers remember all of the things that have happened before. It keeps track of every change that has ever been made, just like how you might remember all of the times you played with a specific toy and changed how it looked or how you played with it.
The history monoid is built in a way that allows people to combine different changes that have been made to a computer system, just like how you might combine different toys in your toy box to make something new. This way, you can make sure that everyone who works on the system can keep track of all the changes that have been made in the past, even if different people made those changes.
Imagine that every time you play with your toy box, you write down all of the changes you made in a special notebook. Then, if you want to combine those changes with someone else's changes, you can just take out the notebooks and look at what each person did. The history monoid is like that notebook, but for computer systems!
The history monoid is built in a way that allows people to combine different changes that have been made to a computer system, just like how you might combine different toys in your toy box to make something new. This way, you can make sure that everyone who works on the system can keep track of all the changes that have been made in the past, even if different people made those changes.
Imagine that every time you play with your toy box, you write down all of the changes you made in a special notebook. Then, if you want to combine those changes with someone else's changes, you can just take out the notebooks and look at what each person did. The history monoid is like that notebook, but for computer systems!