Starlink Data File. A file with the extension .sdf accessible via Starlink software or libraries.

Slew Data File

Standard Data Format or Schedule Data File System File Format or Autodesk MapGuide Spatial Data Files

Standard Data Format (file name extension)

Script Description File. a file describing certain kinds of complex script behaviour, used to control a rendering engine to which it has given its name. Created by Tim Erickson and used in Shoebox, LinguaLinks, and ScriptPad.

see Script Description File.