Reference: http://us.imdb.com/Glossary
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Filmmakers:
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(A collective term used to refer to people who have a significant
 degree of control over the creation of a movie: directors, producers,
 screenwriters, and editors.)

  Executive Producer
    - A producer who is not involved in any technical aspects of the 
      filmmaking process, but who is still responsible for the overall
      production.  Typically, an EP handles business and legal issues.

  Producer  (REQUIRED) 
    - The chief of a movie production in all matters save the creative
      efforts of the director.  Responsible for raising funding, finding 
      key personnel, arranging for distributors.

  Associate Producer
    - Shares responsibility for creative and business issues.

  Line Producer
    - A producer who is responsible for managing every person and issue
      during the making of a film.  Line producers only work on one film 
      at a time.  

  Director  (REQUIRED)
    - The principal creative artist on a movie set.  A director is usually
      the driving artistic source behind the filming process, and communicates
      to actors the way that he/she would like a particular scene played.
      A director's duties might also include casting, script editing, shot
      selection, shot composition, and editing.

  Director of Photography (DP)  (REQUIRED)
    - A cinematographer who is ultimately responsible for the process of
      recording a scene in the manner desired by the director.  The DP has 
      a number of possible duties: selection of film stock, cameras and 
      lenses; designing and selecting lighting, directing the gaffer's 
      placement of lighting, shot composition (in consultation with the
      director).

  Unit Production Manager
    - An executive who is responsible to a senior producer for the 
      administration of a particular movie.  UPMs only work on one film 
      at a time.

  Screenwriter  (REQUIRED)
    - Writes the script

  Art Director  (REQUIRED)
    - The person who oversees the artists and craftspeople who build the
      sets.

  Editor  (REQUIRED)
    - A person who performs editing (in consultation with the director) on
      a movie. This term usually refers to someone who does visual editing.

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Publicity Department:
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(The section of a production's crew responsible for promoting a movie.)

  Publicity Director  (REQUIRED)
    - Chief of the publicity department, responsible for promoting the movie
      through the media.

  Publicity Assistant
    - Assistant to the publicity director.

  Still Photographer  (REQUIRED)
    - A person who photographs the action (often alongside the camera) to
      be used in publicizing the movie.

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Production Personnel:
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  Director
    - See above.

  Assistant Director  (REQUIRED)
    - An assistant director's duties include tracking the progress of filming
      versus the production schedule, and preparing call sheets (a listing
      of which actors will be required for which scenes and when they will
      be required).

  Second Assistant Director  (REQUIRED)
    - An assistant to the assistant director.  Duties include overseeing the
      movements of the cast, and preparing call sheets.

  Third Assistant Director  (REQUIRED)
    - An assistant to the second assistant director; responsible for (among
      other things) directing the movements of extras.

  Script Supervisor  (REQUIRED)
    - A person who tracks which parts have been filmed, how the filmed scenes
      deviated from the script; they also make continuity notes, creating a 
      lined script (a copy of the shooting script which is prepared during
      production to indicate, via notations and vertical lines drawn directly
      onto the script pages, exactly what coverage has been shot.)

  Production Manager  (REQUIRED)
    - Reporting to the film's producer, this person is responsible for the
      practical matters such as ordering equipment, getting near-location
      accommodations for the cast and crew, etc...

  Production Secretary
    - Secretary to the Production Manager

  Location Manager  (REQUIRED)
    - A person who manages various aspects of filming on location, such 
      as arranging with authorities for permission to shoot in specific places.

  Location Scout  (REQUIRED)
    - A person who looks for suitable locations for filming.

  Production Illustrator  (REQUIRED)
    - A person responsible for drawing the storyboards and anything else
      that needs to be drawn during the production of the movie.

  Costume Designer  (REQUIRED)
    - A person who designs the costumes for a movie.

  Costume Supervisor
    - A person responsible for handling the costumes worn by actors.

  Set Director  (REQUIRED)
    - The art director's assistant in designing and constructing sets.

  Set Dresser  (REQUIRED)
    - A person who has total charge of decorating the set with all 
      furnishings, drapery, interior plants, and anything seen on indoor 
      sets or on the walls.

  Property Master  (REQUIRED)
    - A person responsible for buying/acquiring any props needed for a 
      production.

  Property Assistant  (REQUIRED)
     - Responsible for the placement and maintenance of props on a set.

  Production Assistants  (REQUIRED)
    - People responsible for various odd jobs, such as stopping traffic,
      acting as couriers, fetching items from craft service, etc.  PA's are
      often attached to individual actors or filmmakers.

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Camera Crew:
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  Director of Photography
    - See above.

  Camera Operator  (REQUIRED)
    - The person who operates the camera to the specifications dictated 
      by the DP.

  Assistant Camera Operator  (REQUIRED)
    - Assists the camera operator.  Responsible for the maintenance and 
      care of the camera, as well as preparing dope sheets (a list of scenes
      from the script that have already been filmed, or a list of contents
      footage already shot).

  Focus Puller
    - A member of the camera crew who adjusts the focus of the camera 
      during filming.

  Clapper-Loader  (REQUIRED)
    - The person who operates the clapboard at the beginning of a shot,
      also responsible for loading the camera.

  Dolly grip  (TBD)
    - A grip that moves a dolly.

  Key grip
    - The chief of a group of grips, often doubling for a construction 
      co-ordinator and a backup for the camera crew.  Key grips work closely
      with the gaffer.

  Grip  (REQUIRED)
    - A person responsible for the adjustment and maintenance of production
      equipment on the set.  Their typical duties include laying dolly tracks 
      or erecting scaffolding.

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Sound Crew:
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(Create the sound track in collaboration with the director.)

  Sound Designer
    - The conceptual chief of a movie's soundtrack, responsible for designing
      and creating the audio component of a movie.

  Sound Editor
    - A member of the sound crew who performs editing on the soundtrack.

  Sound Mixer
    - An audio engineer who performs the sound mix.

  Sound Recordist  (REQUIRED)
    - Responsible for operating the audio recording equipment on a set.

  Boom Operator  (REQUIRED)
    - Responsible for operating the boom microphone.

  Re-Recording Mixer
    - Responsbile for mixing the final sound elements (dialogue, music, S/FX
      and foley).

  Music Supervisor
    - A person who coordinates the work of the composer, the editor and 
      sound mixers.

  Foley Artist
    - A person who creates foley sound effects.

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Lighting Crew:
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(Lighting is designed by the DP in consultation with the director, and is 
 the responsibility of the electrical department).

  Gaffer  (REQUIRED)
    - The head of the electrical department.

  Lighting Technician  (REQUIRED)
    - A member of the electrical department that is responsible for operating
      lights and lighting equipment on a set.