Wilhelm Windy was the first psychologist (self declared.) He was the first to create the study of the mind's own science, psychology. Before, the study of the mind was just a small part of both physiology and philosophy. Wundt believed it should be its own science. He created the first laboratory for psychology.
One, two and four are limitations of psychological experiments.
Software development. A software developer designs and creates tech which can be used for multiple purposes, both creative, practical and for entertainment purposes. A digital music manager would fall into the category of being some software in which a user could develop a method to manage music.
Developed along waterways so that settlers could have access to water for crops and food
Accountants only concern themselves with direct costs which involve things like the cost of materials, rent, and labor for instance. This profit is aptly named "accounting profit".
Economists consider those costs as well, but they also include indirect costs such as opportunity costs of other investments. Recall that opportunity cost is the cost of what you give up if you make a certain decision.
For instance, if a car factory makes 4 door sedans, but it could be making more money with SUVs, then the opportunity cost is high and the economic profit is lower compared to the accounting profit.
