By injecting concepts into the collection of parameters we construct models. Concepts range from very simple, such as a linear correlation, to the very complex, like evaporating black holes. The injection of concepts happens spontaneously and associatively, it is a result of the evolution of our brain. It allowed us to introduce order into the world and to function in it. Given the fact that no theory is ever complete it is more correct to say that all models are hypotheses.
Good models allow to make predictions as to future observations.
They also allow to add to our pool of concepts by abstraction and generalization. If a model conflicts with observations we have to discard it. Data acquisition, i.e., areas like telescope and instrument control, signal processing, and planning and scheduling are represented by 11 papers. Classical data analysis, including analysis systems, archives and surveys, is represented by 12 papers. This clearly is in line with the historical development.