*Its All about Pj Problem Strings -
7 Spaces Of Interest and their associated Basic Sequences; 7 Pj Problems of Interest (PPI) and their Alleles (A)*

A *net* is a group of interconnected spaces. The spaces may be small (a point net, a mosquito net) or they may be large (a net of cities, a net of countries, a net of continents). The interconnections also vary in both manner of connection and the materials used for the connections. For example, the connections may be local (LAN) or wide (WAN); visible (wire connections) or invisible (radio waves connections). When *matter* contained in a *net* do work, the *net* is called a *network*. In other words, when the interconnected spaces of a *net* are all empty spaces, no *work* is done by the *net*. Therefore, such a *net* is not a * network*.

*Networks* are existential prerequisites for the formation of complex *beings*. For example, all human-body systems are *networks*. Each *network* is assigned its *work* and together they form the complex *network* that maintains the body's primordial equilibrium. *Trade networks* expressed as markets; *city networks* (interconnection of cities); *computer networks*; *telecommunication networks*; *health-system networks* are other examples of *networks*. In fact, nature's *networks* and man-made *networks* are everywhere. *The Internet Of Everything* was established by nature long ago. Humans are only just beginning to *toolify* the concept.

The connected spaces; the matter and energy in the spaces; the connections and the work done within the connected spaces are all expressions of Pj problems. Consequently, *networks* are expressions of Pj Problems.