Actually, I have a lot of hobbies, but I've kept up with modelbuilding the longest. In particular, I love military models.

General Systems Theory is a name which has come into use to describe a level of theoretical modelbuilding which lies somewhere between the highly generalized constructions of pure mathematics and the specific theories of the specialized disciplines. Mathematics attempts to organize highly general relationships into a coherent system, a system however which does not have any necessary connections with the "real" world around us. It studies all thinkable relationships abstracted from any concrete situation or body of empirical knowledge.
kenneth bouldingGeneral Systems Theory is a name which has come into use to describe a level of theoretical modelbuilding which lies somewhere between the highly generalized constructions of pure mathematics and the specific theories of the specialized disciplines. Mathematics attempts to organize highly general relationships into a coherent system, a system however which does not have any necessary connections with the "real" world around us. It studies all thinkable relationships abstracted from any concrete situation or body of empirical knowledge.