<P> There are also some social systems, which allow humans to collectively achieve a specific purpose . </P> <P> A system created by humans, and derived from intangible purposes . For example: a family, that is a hierarchy of human relationships, which in essence create the boundary between natural and human systems . </P> <P> An organisation with hierarchy, created by humans for a specific purpose . For example: a company, which organises humans together to collaborate and achieve a specific purpose . The result of this system is physically identifiable . There are, however, some significant links between with previous types . It is clear that the idea of human activity system (HAS), would consist of a variety of smaller social system, with its unique development and organisation . Moreover, arguably HASes can include designed systems - computers and machinery . Majority of previous systems would overlap . </P> <P> There are several key characteristics, when it comes to the fundamental behaviour of any system . </P>

Where does sorting fit into the ipos model