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.