Principle of abstraction

From HandWiki

The principle of abstraction is a grouping principle, whereby a hierarchy is adhered to with higher levels of abstraction placed near the top with more specific concepts underneath.

Example

For the teaching (not personnel) organization of a university the levels of abstraction would go something like this:

University

Faculty of Science
Department of Physics
Subject: Physics 101
Topic: Fluid dynamics
Department of Earth Sciences
— Department of Biology
Faculty of Arts
Department of History
Subject: Australian History
• Topic: 1850-1854 Victorian Gold rush
— Department of Philosophy
— Department of Literature
Faculty of Medicine
— Department of Immunology
— Department of Neurosurgery
— Department of Endocrinology