Overview
The IMDb  website  consists of one of the largest  accumulation of data  about films, television  programs, direct-to-video products,  and video games, reaching back to each medium's respective beginning. In many cases, the information goes beyond simple title or press credits to include complete cast and crew credits, uncredited personnel, production and  distribution companies, plot summaries, memorable  quotes, awards, reviews, box  office performance, filming locations, technical  specs, promotional content, trivia, and  links to  official and  other websites. Furthermore, the IMDb tracks titles in production, including major  announced projects still in  development. The database  also houses filmographies  for all persons, cast and crew, identified in  listed titles. Filmographies include biographical details, awards listings, external links, and information about other professional work not covered by title entries in the database such as theatrical and commercial advertising  appearances. The IMDb also offers ancillary material such as daily movie and TV news, weekly box office reports, TV listings, cinema showtimes, user polls and ratings, and special features about various movie events such as the Academy Awards. The website also has an active message board system. There are  message boards for each database entry, found at the bottom of each respective page, as well as general discussion boards on various  topics.
All of the basic database information is available without registration and without providing any personal information. However, to submit information, to use the message boards, to search for information about adult movies or to use some other of the site's features requires registration. Some advanced features require verification which can sometimes require some personal financial information such as credit card details. IMDb has 57 million visitors, 17 million of which are registered users, as of October 10, 2007.
Database content is largely  provided and updated by a cadre of volunteer contributors; although 20 members of the IMDb staff are dedicated to monitoring received data.
For automated queries, most of the database can be downloaded as compressed plain text files and the information can be extracted using the tools provided, typically using a command line interface.
In 2002, the IMDb spun off a private, subscription-funded for profit site, IMDbPro, offering the entire content of the database plus additional  information for business professionals, such as personnel contact details, titles in development, movie event calendars, and a greater range of industry news.
In 2006, IMDb introduced its "Résumé subscription service", where actors and crew can post their own résumé and upload photos of themselves for a yearly fee.[4] IMDb résumé pages  are kept separately from the regular entry about that person, but a regular entry is automatically  created for each résumé subscriber who  does not already have one.
History
In rec.arts. movies
The database  originated from two lists started as independent  projects in early 1989 by  participants in the Usenet newsgroup  rec.arts.movies. In each case, a single maintainer recorded items  emailed by newsgroup readers, and posted updated versions of his list from time to  time. Google Groups coverage  of rec.arts.movies is incomplete during the relevant time period, with a 6-month gap in late 1988 and early  1989 and a number of missing articles after that.
It began with a  posting titled "Those Eyes", on the subject of actresses with beautiful eyes. Hank Driskill began to collect a list of attractive actresses and what movies they  had appeared in, and as the size of the  repeated posting grew far beyond a  normal newsgroup article, it soon became known simply as "THE LIST". (The first code to manage this list was a Perl  program written by Randal L. Schwartz to "invert the list", organizing the list by movies instead of actresses.[6])
The other project, started by Chuck Musciano, was briefly called the "Movie Ratings List" and soon  became the "Movie Ratings Report". Musciano simply  asked readers to rate movies on a scale of one to ten, and reported on the votes. He soon began posting "ballots" with lists of movies for people to rate, so his list also grew quickly.
In 1990, Col Needham collated the  two lists and produced a "Combined LIST & Movie  Ratings Report".[7] (His first posting of the database scripts is not available.) Needham soon started a (male) "Actors List", while Dave Knight began a "Directors List", and Andy Krieg took over THE LIST, which would later be renamed as the "Actress List". Both this and the Actors List had been restricted to people who were still alive and working, but retired people began to be added, and Needham also started what was then (but did not remain) a separate "Dead Actors/Actresses List". The goal now was to make the lists as inclusive as the maintainers could manage. In late 1990, the lists included almost 10,000 movies and television series. On October 17, 1990, Needham posted a collection of Unix shell scripts which could be used to search the four lists, and the database that would become the IMDb was born. At the time, it was known as the "rec.arts.movies movie database".
On the web
By 1993, the database had been expanded to include additional categories of filmmakers and other demographic material, as well as trivia, biographies, and plot summaries; the movie ratings had been properly integrated with the list data; and a centralized email interface for querying the database had been created. Later in the year, it moved onto the World Wide Web (a network in its infancy back then) under the name of Cardiff Internet Movie Database. The database resided on the servers of the computer science department of Cardiff University in the UK. Rob Hartill was the original web interface author. In 1994, the email interface was revised to accept the submission of all information, meaning that people no longer had to email the specific list maintainer with their updates. However, the structure remained that information received on a single film was divided among multiple section managers, the sections being defined and determined by categories of film personnel and the individual filmographies contained therein. Its management also continued to be in the hands of a small contingent of underpaid or volunteer "section managers" who were receiving ever-growing quantities of information on films from around the world and across time from contributors of widely varying levels of expertise and informational resources. Despite the annual claims of Needham, in a year-end report newsletter to the Top fifty contributors, that "fewer holes" must now remain for the coming year, the amount of information  still missing from the database was vastly underestimated. Over the next few years, the database was run on a network of mirrors across  the world with donated bandwidth.
As an  independent company
In 1995, it became obvious to the principal site managers  that the project had become too large to maintain merely through donations and in their spare time. The decision was made to become a commercial venture and in 1996, IMDb was incorporated in the United Kingdom, becoming the Internet Movie Database Ltd, with Col Needham the primary owner as well as identified figurehead. The remaining shareholders were the people maintaining the database. Revenue was generated through advertising, licensing and partnerships.
This state of affairs continued until 1998. The database was growing every day, and it was again reaching a critical point. Most revenues were being spent on equipment, and there was not enough money left over to pay full-time salaries. The system was also suffering noticeable slowdowns both in accessing the site and in having new data posted. Offers were solicited and received from major businesses to purchase the database; however, the shareholders were unwilling to sell if it could not be guaranteed that the information would be accessible to the internet community for free.
As a subsidiary company
A screenshot of IMDbPro in June 2008
In 1998, Jeff Bezos, founder, owner and CEO of Amazon.com struck a deal with Col Needham and other principal shareholders, to buy IMDb outright and attach it to Amazon as a subsidiary, private company.[8] This gave IMDb the ability to pay the shareholders salaries for their work, while Amazon.com would be able to use the IMDb as an advertising resource for selling DVDs and videotapes. Volunteer contributors were not advised in advance of even the possibility of IMDb - and their contributions along with it - being sold to a private business, which created some initial discord and defection of regulars.
IMDb continues to expand its functionality. In 2002, it added a subscription service known as IMDbPro aimed at entertainment professionals. It provides a variety of services including production and box office details, as well as a company directory. Most information contained in the IMDb database proper continues to come from volunteer researchers. An additional incentive, since 2003, is that if they are identified as being one of "the top 100 contributors" in terms of amounts of hard data submitted, they receive complimentary free access to IMDbPro for the following calendar year; for 2006 this was increased to the top 150 contributors, and for 2007 to the top 175.
  



