I have been asked by more than one reader who isn't in the industry what certain terms mean. Here is a handy glossary (not in alphabetical order cause I ain't got time for that):
AD- Assistant Director- The director's right hand person. Does the shooting schedule, calls rolling to roll camera, keeps the set moving by dealing with logistics so the director can concentrate on the actual creative process, deals with extras, keeps the set moving.
DP- Director of photography (also cinematographer). Lights the set. Chooses lenses, shooting stops, etc. Basically responsible for the look of the movie. Head of the camera department, grip, and electric departments.
Dance Floor- A surface laid over an existing floor by the dolly grip when the floor is not smooth enough and the camera moves are not linear in which case track could be used. Usually consists of 3/4" birch or oak plywood covered with a 1/" top of plastic sheets called ABS or Sintra.
PA- Production assistant. Often an entry level job under the AD. "Locks up" roads, streets buildings, etc to keep crew members and non crew members from walking into the shot. Has many other responsibilities such as wrangling extras etc.
Technocrane- A camera crane with an extendable arm. Commonly used lengths are 30 and 50 footers although there are max lengths anywhere from 10' to 100'. Camera is operated remotely by the camera operator. The arm is extended by use of a control commonly referred to as a "pickle." Often the pickle is operated by one person while the arm is swung around by the dolly grip. While Technocranes used to be a specialty item only brought in for particular shots, now they are common and a show will often "carry" one for the run of shooting. Has made use of fixed length cranes very uncommon (anyone want to buy a Giraffe Crane?).
Electrician- In the movie world, electrician refers to Lamp Operator, not a household electrician like you may think. Electricians in movie world are also called sparks, or juicers. They power the set and set up and operate the lighting instruments under the direction of the Gaffer.
These are common terms I may use from time to time. If there are any more terms you would like defined please shoot me an email.