Box office collection refers to the amount of money generated by ticket sales for a particular production, such as a film or theatre show. The term "box office" originally referred to the actual office in a theater where tickets could be purchased or reserved. Today, the term is used as a metonym for the amount of business a particular production receives. Box office business can be measured in terms of the number of tickets sold or the amount of money raised by ticket sales. The projection and analysis of these earnings is greatly important for the creative industries and often a source of interest for fans. The box office collection is a key indicator of a productions success and profitability.