What is "Chronological Order" in chess? I have heard about "chronological order" in chess. But I don't know what it is exactly. 

Can someone tell me what this is?
To be frank, chronological order is not really a chess thing as much as a general thing that is just defined by English.

In 40 years of playing, and reading (at my peak, I had 1800 chess books, and have read 300 cover to cover), that is the first time I have heard the term "chronological order" attempted to be used as a pure chess term.

So to be clear, what I am saying is that it is not a standard chess term, however, it is a common general English term (speaking as a native English speaker) that can be applied to chess or anything else. The person, who wrote that was just using common English lexicon, not common chess lexicon, and it does, indeed, mean "the order in time that you do things".

P.S. To back this up, I also just searched 615 digital chess books, and "chronological order" was found in 20 books, however, after looking at every one of them, and how it was used, it was just used to describe layouts of the material in the book....still not as a pure chess term.