[HenryR]

You might not be aware that this is one of, if not the, seminal paper in distributed systems.

Lamport clocks, described briefly in the review, are an answer to the general problem of establishing an order between events that happen on different machines that respects causality. They’re still practical to this day, over 50 years after this paper was published.

There are lots of in-depth descriptions of the paper and its contributions elsewhere. I’d totally recommend finding them - it’s a great paper and not a hard read at all.