Miscellaneous Instructions

These are a variety of instructions (some of which are obsolete) primarily for program information and control.

CNTRL	Controls interactive procedures
DEFAULT	Changes default option settings for RATS instructions
END	Ends a RATS program
ENTER	Creates user-defined supplementary cards for procedures
ENVIRONMENT	Sets error modes and other options
HALT	Stops execution from within a compiled section
INQUIRE	Returns information from RATS (e.g. length of series, etc.)
LIST,CARDS	Simplifies use of multiple supplementary cards
OS	Shell to external program controlled by operating system
QUERY	Requests Input from the user
RELEASE	Releases segments of memory
SEED	Initializes the random number generator
SHOW	Displays amount of free memory and other information