Pharmaceutical Careers Background Through trial and error, prehistoric humans discovered that certain plants were effective in treating injuries and fevers. Once a plant was recognized as having medicinal qualities, the information was passed from generation to generation. Gradually, one person in a tribe or social group acquired considerable knowledge of these treatments and was appointed […]
Photography Career Field
Photography Careers Background In the photographic process, images are produced by exposing light-sensitive chemicals called silver halides to light. The more light these chemicals are exposed to, the darker they become. After the silver halides are developed and fixed, a negative image is produced. The negative image, which is usually made on film, is then […]
Plastics Career Field
Plastics Careers Background Since the first synthetic plastics were produced in 1909, plastics have become a part of everyday life. Plastics can be manufactured to be hard enough to use as dies for shaping metal or soft enough to weave nylon stockings. Surgeons can use plastic screws to join broken bones; architects use plastics that […]
Printing Career Field
Printing Careers Background Printing is a dynamic and highly technical industry that enters into nearly every facet of our lives. Practically every product you buy, use, or look at involves some sort of printing: a sign in a store window, your favorite magazine, a soda can or cereal box, the instructions to the latest computer […]
Public Relations Career Field
Public Relations Careers Background The origins of public relations date back to early Greece, when Socrates, Plato, and Aristotle developed rules of rhetoric that made arguments more effective. Their methods were used in jury trials, ethics instruction, and other situations in which reason guided the discussion. In the late 19th century, newspapers decided to encourage […]
Public Safety Career Field
Public Safety Careers Background Virtually every aspect of life involves policies, regulations, and laws that help to promote public safety. The exterior of a house meets certain codes, or rules, so that it won’t catch on fire easily. Every time you drive a car, you follow a number of rules so that you won’t cause […]
Publishing Career Field
Publishing Careers Background The origins of publishing remain unknown. Historians have proposed various theories on the subject, but the best guess is that publishing came into existence when people developed written language, perhaps in Sumer in approximately 4000 BC. After it became possible to record information in writing, somebody had to decide which information was […]
Pulp and Paper Career Field
Pulp and Paper Careers Background How much paper do you think you use? According to one estimate, the average American consumes more than 700 pounds per year. Although this may sound like a lot, it’s really not so surprising, given the vast number of paper products produced every year used for everything from mopping up […]
Radio Career Field
Radio Careers Background Broadcast technology developed in the 20th century enabled people to reach large audiences around the world instantly, changing forever the way we communicate. The power and mystery of the radio broadcast in the United States has been marked by events like Orson Welles’s 1938 live radio broadcast of “The War of the […]
Railroad Career Field
Railroad Careers Background Despite its decline as a method of passenger transportation, the railroad remains the most efficient method of land transportation because it requires the least amount of fuel and human labor and is the least damaging to the environment. Found in almost every country in the world, railroads have transported millions of passengers […]
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