HEAP_NOSAVE - Clear the save attribute of pointer or object heap variables.
HEAP_SAVE - Query whether a pointer or object heap variable is savable.
IDL_Savefile - Object that provides complete query and restore capabilities for IDL SAVE files.
IRESOLVE - Resolve all code required for the iTools framework.
JOURNAL- Log commands to a file.
RESOLVE_ALL - Iteratively resolve and compile any necessary procedures or functions.
RESTORE - Restore variables and routines from an IDL SAVE file.
SAVE - Save variables, system variables, or routines in a file.