What does inside the system and outside the system mean?

Often, one of the challenges in understanding a system is knowing what to consider “inside” and “outside” it. By this I mean which elements are part of the system — affecting its outcomes — and which aren't. ... The car and the fueling network make up a bigger system of which the car on its own is but a mere subsystem.

Los sistemas pueden clasificarse en dos grandes categorías: Sistemas conceptuales. Se trata de conjuntos ordenados e interrelacionados de conceptos e ideas, que pueden ser de cuatro tipos diferentes: individuos, predicados, conjuntos u operadores. Son de tipo abstracto, intangible.