The text body consists of symbols that have material carriers. The letters and images in the library are material, the paper and canvas that carry letters and images are material. The rack in which the books are stacked and the house in which the racks are placed are material carriers of the symbols.

The librarians, who do not have their legitimacy as librarians until they have (created) a library, produce the library, making them librarians. [Critique]

The library is "fractal", the individual departments and the books in the departments and the essays in the books are all organized like the library itself. The library has rooms, the works have volumes, the volumes have chapters, the chapters have sections. The library has a register, the books have tables of contents. All texts in a library refer more or less explicitly to all other texts in the library.

Instructions to potential librarians:
 
Consciously imagine the library as a system!

In some more or less conscious way, most people will imagine the library as a system. The point here is to consciously choose this perspective.

Implementation:
 
Name some aspects of a library that distinguish it as a system.

"Introducing" is operationalized here as "pronouncing features".

A typical model of a system is the thermostat-controlled heating. In the system view we see states, conditions and operations.

Example:
 

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If a book is borrowed very often, librarians will create several copies of it. There are target values that a book must fulfill in order to be included in the library. and so on.

Imagining a system can mean imagining some feedback-related behavior. When we design a library as a system, we are a kind of "heating" engineers.