HOST.

in the Editor, and run this command as you would any other (ESC- 0, then RETurn). You will be placed at your UNIX prompt. When you are finished doing what you need to do, type CTRL-D and you will see a prompt to hit RETurn to go back to SPSS.

While you are in SPSS, if you want to issue a UNIX command but don't necessarily need to exit SPSS to do it, you can pull up a special window which will accept and execute UNIX commands without leaving SPSS. To activate the special window, type ESC-! (that's the ESCape key and the exclamation point, which is SHIFT-1). Depending on what command you have issued, you can resume SPSS processing by hitting return or, in some instances, by typing CTRL-D.