Source : Free On-Line Dictionary of Computing

Portable Forth Environment
     
         (PFE) A highly {portable} {Forth} development
        system based on the {ANSI} standard for Forth, by Dirk-Uwe
        Zoller of FHT, Mannheim, Germany.  PFE aims to be correct,
        complete, usable, and simple but it isn't optimised for speed.
        It supports all {dpANS} {word sets}.  It runs on {Linux},
        {RS/6000}, and {HP-UX}.
     
        {Tektronix} adopted PFE in 1998 and added {modules} and
        {multithreading}.  You can load additional {C} objects at
        {run time} to extend the Forth {dictionary}.  It can be
        targeted at different embedded environments by changing the
        terminal driver and initilisation routines.
     
        Current version: 0.30.27 preview, as of 2000-11-23.
     
        {Home (http://pfe.sourceforge.net/)}.
     
        E-mail: Guido Draheim .
     
        (2000-12-07)