I think any list like this has to include: "Time, clocks, and the ordering of events in a distributed system" By Lamport also, in almost any networked system ha

I think any list like this has to include: "Time, clocks, and the ordering of events in a distributed system" By Lamport also, in almost any networked system having strict ordering is fantastically useful. And of course how could we also forget "The Byzantine generals problem".