M-x sml Start the SML interpreter (buffer will be called *sml*)
C-c C-s Switch to SML interpreter
C-c C-l Load a file into the SML interpreter
C-c C-r Send the current selection to the SML interpreter
C-c C-b Send current buffer to the SML interpreter
C-c ` Browse through the source file for the next error
C-c C-d Terminate the SML interpreter