Non-Linear

In mathematics and science, a nonlinear system is a system in which the change of the output is not proportional to the change of the input.[1][2] Nonlinear problems are of interest to engineers, biologists,[3][4][5] physicists,[6][7] mathematicians, and many other scientists because most systems are inherently nonlinear in nature.[8] Nonlinear dynamical systems, describing changes in variables over time, may appear chaotic, unpredictable, or counterintuitive, contrasting with much simpler linear systems. https://en.wikipedia.org/wiki/Nonlinear_system

Also refers to writing artifacts that do not follow a linear/hierarchal structure: hypertext etc.