FileFormat["name"] attempts to determine what Import format could be used to import the file corresponding to " name".

FindShortestPath[g, s, t] finds the shortest path from source vertex s to target vertex t in the graph g.FindShortestPath[g, s, All] generates a ShortestPathFunction[...] ...

FormBox[boxes, form] is a low-level box construct which displays as boxes but specifies that rules associated with form should be used to interpret boxes on input.

GapPenalty is an option for SequenceAlignment and related functions that gives the additional cost associated with each gap corresponding to a run of insertions or deletions.

Gradient is an option for FindMinimum and related functions that specifies the gradient vector to assume for the function being extremized.

GraphPower[g, n] gives the graph-n\[Null]^th power of the graph g.

ImageCapture[] opens a graphical user interface for capturing images from connected cameras.

ImageChannels[image] gives the number of channels present in the data for the Image object image.

ImageResolution is an option for Export, Rasterize, and related functions that specifies at what resolution bitmap images should be rendered.

ImageSizeMultipliers is an option that specifies how much smaller to render graphics that appear within other constructs.