An interdisciplinary field of engineering, focusing on the development, analysis and organization of complex systems.

An interdisciplinary field of science which studies the nature of complex systems in nature, society and science, and studies complex parts of reality as systems.

A complete set of institutions, political organizations, interest groups (such as political parties, trade unions, lobby groups), the relationships between those institutions and the political norms and rules that govern their functions (constitution, election law).

(history) A particular system of measuring mass and volume.

plural of type system

(computing) A way programming language classifies values and expressions into types, how it can manipulate those types and how they interact.

(anatomy) The system of organs serving for respiration.

(astronomy) A method of stellar classification in which stars are assigned Greek letters (α, β, γ, etc.) in decreasing order of brightness.

(physics) The portion of the physical universe chosen for analysis, with everything outside the system known as the environment.

A mathematical model of a system based on the use of a linear operator.