I. Description of Fairs, Expositions and Exhibitions
B. Types of Exhibitions

Expositions and exhibitions
have always been combined with the display of goods and products.7)

Exhibitions differed from fairs in four major ways:8).

First, exhibitions were usually one-time events. They did not enjoy a recurring life cycle. However, while fairs ran for a short period of time, many exhibitions ran for months, some for a year or longer.

Second, exhibitions were housed in permanent facilities built specifically for them. Starting in the 18th century, the practice of building a facility for the express purpose of housing an exhibition was the precursor of the exposition/convention centre industry.

Third, although fairs were held regularly, they were not highly organized events. Over time, religious and later civic leaders did take control of the grounds where fairs were held (usually public lands). Exhibitions, on the other hand, were highly organized events. They were initially created by government departments or committees for the purpose of promoting trade.
 
Finally, exhibitions differed from fairs in the very way in which business was conducted. Goods were bought and sold at fairs. At exhibitions, commercial activity or selling of the displayed goods, was not usually involved. However, inherent in displaying the goods was the hope of stimulating future sales. Today this is how most exhibitions still operate.