What's the difference between an open and closed loop cooling system in a boat engine?

Boat engines have either open or closed loop cooling systems. How do these two differ, and is one better than the other? Here ...
Finextra

Bridging the Gap Between Closed-Loop and Open-Loop Payments Systems

Payments ecosystems are often categorized as either closed-loop or open-loop systems, each with distinct advantages and limitations. Closed-loop systems, such as single-provider mobile wallets like ...
KSL

Closed-loop cooling systems save water, but can be a drain on electricity

Dr. Robert Ricci describes how closed loop cooling works inside a small data center at the University of Utah. (Mike Anderson, KSL) SALT LAKE CITY — Inside what is, in many ways, a tiny data center ...