Overview of the elective system in the usa?

Throughout history, the idea of alchemy or chemistry between people, i.e. "interpersonal" chemistry, is usually made in reference to romance. Those in love, for example, are said to have found the perfect chemistry with another person. In recent years, however, analogies have branched off and developed in other fields such as business or consulting. In software consulting, project chemistry is a sought after quantity. Certain people are often selectively added to project teams to serve as a catalyst for the group. From the famous 1987 book Peopleware, by Tom DeMarco and Timothy Lister, for example, a person who functions as a "catalyst" in a project group is important because projects tend to always be in a state of flux; thus if someone has the skill-sets to energize a group, the project will be completed quicker and more efficiently. Catalysts, in chemistry, whether a person or a quantity of matter, tend to encourage or speed chemical reactions by lowering the activation energy barrier of the reaction. Someone who can help a project "jell" is worth two people who just do work. A related term introduced by DeMarco and Lister, is corporate entropy, in which they view energy waste as red tape and business team inefficiency as a form of entropy, i.e. energy lost to waste. This concept has caught on and is now common jargon in business schools.