Today Virtual reality allows people to study artificial worlds through simulation and computer graphics. Computers have changed the way we perform flight training, scientific research and conduct business. Flight simulators have drastically reduced the time and money required to learn to fly large jets. One of the most interesting capabilities of virtual reality is the ability to practice certain medical practices. Computers are helping many doctors perform complicated operations very simply. Computers have changed the way we look at health problems. They have made incurable health problems very easy to solve in today's society.
We have only begun to realize the extreme wastefulness of burning expensive fuel in aircraft in order to learn something in an hour that could be taught in ten minutes in a simulator. Simulators have come a long way since 1929, when Ed Link first built what was soon to be known as the pilot maker, or more affectionately, the blue box.
Students often find themselves sitting at the end of a runway waiting for takeoff clearance on a busy day, with the engine turning and burning expensive gas. This is not a very effective way for students to spend money. Most students do not have access to expensive flight simulators. Most have to travel hundreds of miles to take advantage of these amazing simulators. Flight simulators are much better than an airplane for the simple reason that in a simulator the learning environment is much safer. Students are able to avoid the overriding need to keep the airplane flying and out of harm's way. In a simulator a student is constantly busy, practicing what he is supposed to be learning, and once he's flown a given maneuver, he is able to go back and do it over again, without wasting time or fuel.