A manual or a textbooks for an field that is more applied than descriptive is full of procedural knowledge for solving the problems of that domain. You can find very good books explaining how to draw portraits, but for some reason people don’t openly say portrait drawing is solved. Maybe in applied fields we just work to solve bigger and harder problems, like figuring out how to forecasting the weather ever more accurately, and once the problems are mostly, reliably solved the fields just quietly disappear. Like we don’t have lamp lighters anymore, because light bulbs mostly and reliably solve the problem that lamp lighters were specialized to deal with. Or it’s unusual for a university education to build up to theology these days, when theology used to be the main reason for universities existing.
The existence of an industry indicates a common problem that humans can make some progress toward solving. http://en.wikipedia.org/wiki/Standard_Industrial_Classification
A manual or a textbooks for an field that is more applied than descriptive is full of procedural knowledge for solving the problems of that domain. You can find very good books explaining how to draw portraits, but for some reason people don’t openly say portrait drawing is solved. Maybe in applied fields we just work to solve bigger and harder problems, like figuring out how to forecasting the weather ever more accurately, and once the problems are mostly, reliably solved the fields just quietly disappear. Like we don’t have lamp lighters anymore, because light bulbs mostly and reliably solve the problem that lamp lighters were specialized to deal with. Or it’s unusual for a university education to build up to theology these days, when theology used to be the main reason for universities existing.