Replace open cages with closed containment systems.

Closed infrastructures are being replaced by connected systems.

A reordering where open systems will replace closed systems.

Closed systems should be located within a controlled area

These systems are therefore called closed loop systems.

You may have heard of open systems and closed systems.

The strategic move is moving from closed systems to open systems.

They are comparing closed systems with open systems.

Thermodynamics distinguishes between open and closed systems.

Methods for controlling spores in aqueous systems, especially closed systems.

You may have heard of open systems and closed systems.

Here are some examples of closed and partly-closed systems:

Systems can exist in three ways as open systems, closed systems, and isolated systems.

This can be studied in one of three systems: open systems, closed systems, and isolated systems.

The concept of entropy applies to open as well as closed systems.