A box office or ticket office is a place where tickets are sold to the public for admission to an event. Patrons may perform the transaction at a countertop, through a hole in a wall or window, or at a wicket.
By extension, the term is frequently used, especially in the context of the film industry, as a synonym for the amount of business a particular production, such as a film or theatre show, receives.
Box office business can be measured in terms of the number of tickets sold or the amount of money raised by ticket sales (revenue). The projection and analysis of these earnings is very important for the creative industries and often a source of interest for fans. This is predominant in the Hollywood movie industry.
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A folk etymology is that this derives from Elizabethan theatre (i.e. late 16th century), where theatre admission was collected in a box attached to a long stick, passed around the audience; comparable to "bottle" in Punch and Judy, where money was collected in a bottle. However, first attestation is about 200 years later, making this highly unlikely.
Some complain that the film industry's focus on revenue or profit has diminished the attention given to film as an art form. However, analysis of the financial success of films is very influential for the production and funding of future works.
Box office reporting
There are numerous websites that monitor box-office receipts, such as Boxoffice, Box Office India, Box Office Mojo, Koimoi, ShowBIZ Data and The Numbers which provide detailed information for many movies but have less and incomplete data for older movies due to the history of how box office reporting evolved, especially in the U.S., and the availability of this information prior to the introduction of the internet.
Although other publications have published box office data over the years, the longevity and regular reporting of Variety makes it a source of a lot of older box office reporting for the U.S. and U.S. films.
During the 1920s, Variety started to report box office grosses for films by theatre for certain U.S. cities. In 1946, they started to publish a weekly National Box Office survey on page 3 indicating the performance of the week's hits and flops based on the box office results of 25 key U.S. cities.
During the 1930s, Variety started to publish charts of the top performing films of the year and has maintained this tradition annually since. In 1946, they published a list of All-Time Top Grossers with a list of films that had achieved or gave promise of earning $4,000,000 or more in domestic (U.S. and Canada) rentals. They would publish an updated all-time list annually for over 50 years, normally in their anniversary edition each January.  The anniversary edition would also normally contain the list of the top performing films of the year.
In the late 1960s, Variety started to use an IBM 360 computer to collate the grosses from their weekly reports of 22 to 24 U.S. cities from January 1, 1968. The data came from up to 800 theatres which represented around 5% of the U.S. cinema population at the time but around one-third of the total U.S. box office grosses. In 1969, they started to publish the computerized box office compilation of the top 50 grossing films of the week based on this data. "The Love Bug" was the number one in the first chart published for the week ending April 16, 1969.
In 1976, Marcy Polier, an employee of the Mann theater chain, set up Centralized Grosses to collate U.S. daily box office data on a centralized basis rather than each theater chain collating their own numbers from other theater chains. The company later became National Gross Service then Entertainment Data, Inc. (EDI).
Except for disclosures by the studios on very successful films, total domestic (U.S. and Canada) box office gross information for films was not readily available until National Gross Service started to collate this data around 1981. The collation of grosses led to wider reporting of domestic box office grosses for films. Arthur D. Murphy at Variety was one of the first to organize and chart that information and report it in a meaningful form. During the 1980s, Daily Variety started to publish a weekly chart of the domestic box office grosses of films as compared to the Top 50 chart in Variety which was based on a sample of key markets.
Gradually the focus of a film's performance became its box office gross rather than the rentals that Variety continued to report annually. Prior to the tracking of these grosses, domestic or worldwide box office grosses is not available for many earlier films so the only domestic or worldwide data available is still often the rental figures.
By 1986, EDI was reporting data for 15,000 screens and in 1987 set up a database of box office information which included data on certain films back to 1970.
In December 2009, with its acquisition of Nielsen EDI for $15 million, measurement company Rentrak became the sole provider of worldwide box office ticket sales revenue and attendance information which is used by many of the websites noted above.
Box office lists
For a list of films which are major box-office hits, see List of highest-grossing films. Films that are considered to have been very unsuccessful at the box office are called box office bombs or box office flops. For a list of these films, see List of box office bombs.
To determine if a movie made a profit, it is not correct to directly compare the box office gross with the production budget, because the movie theater keeps nearly half of the gross on average. The split varies from movie to movie, and the percentage for the distributor is generally higher in early weeks. Usually the distributor gets a percentage of the revenue after first deducting a "house allowance" or "house nut". It is also common that the distributor gets either a percentage of the gross revenue, or a higher percentage of the revenue after deducting the nut, whichever is larger. The distributor's share of the box office gross is often referred to as the "distributor rentals", especially for box office reporting of older films. 
The following is film industry specific terminology as defined by Box Office Mojo. For films released in North America, box office figures are usually divided between domestic, meaning the United States and Canada, and foreign which includes all other countries. Weekly box office figures are taken to be from Friday through Thursday to allow for the fact that most films are released on a Friday. A large component of this is the weekend box office, defined as the box office receipts from Friday through Sunday. In particular, the weekend box office for the initial week of release, or opening weekend, is often widely reported. (See List of biggest opening weekends.)
Theaters is the number of theaters in which the movie is showing. Since a single theater may show a movie on multiple screens, the total number of screens is used as another measure. The theaters measure is used to determine whether a film is in wide release, meaning at least 600 theaters, or limited release which is less than 600 theaters. Occasionally, a film may achieve wide release after an initial limited release; Little Miss Sunshine is an example of this.
Gross refers to gross earnings. On average, the movie's distributor receives a little more than half of the final gross (often referred to as the rentals) with the remainder going to the exhibitor (i.e., movie theater).
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- Will call
- Box office bomb
- Box office territory
- List of highest-grossing films
- Lists of highest-grossing films
- Lists of box office number-one films
- box office, Merriam-Webster
- box office in the Online Etymology Dictionary, Douglas Harper, 2001
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- Robert Hendrickson, Encyclopedia of Word and Phrase Origins, Facts on File, New York, 1997
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- "50 Top-Grossing Films" Variety. April 23, 1969 p. 11
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- "Office Tracking by Time". Box Office Mojo. Retrieved 2010-01-12.