From my understanding, a histogram is a form of graphical interpretation of data. This simply means a picture to reflect data. For example, if you have data like, 20 students in your class smokes...
A model aeroplane is used for presentations and testing. Model planes are also used for fun. They are used model-plane clubs, aeroplane company headquarters and studios. (Bedroom, in my house)
The ancient Germanic tribes and the ancient Scandinavians used runes as an alphabet. Prior to that, they used runes for magic purposes, such as casting lots (divination) and spells of protection.