calls a subroutine or function
groups statements as a unit
iteratively executes a DO group
iteratively executes statements until a condition is satisfied
iteratively executes statements while a condition is satisfied
ends a DO loop or DO statement
frees matrix storage space
jumps to a new statement
conditionally executes statement
jumps to another statement
associates printing attributes with matrices
prints matrix values
removes matrices from storage
sets processing options
executes statements in a module
prints system information
produces a tone
performs indirect assignment
retrieves values by indirect reference