important note
Information in .dec files is always up to date.  In case of confusion or contradiction with documentation, the .dec files are more reliable.  And the .dec files may contain library functions not yet added to the documentation.

  IMPORT "xst" - Standard Library
  IMPORT "xui" - GuiDesigner Library
  IMPORT "xgr" - GraphicsDesigner Library
  IMPORT "xma" - Advanced Math Library
  IMPORT "xcm" - Complex Math Library
  IMPORT "xin" - Internet/Sockets Library