Source : Free On-Line Dictionary of Computing

Pop-11
     
         A programming language created by Robin Popplestone
        in 1975, originally for the {PDP-11}.  Pop-11 is
        {stack-oriented}, extensible, and efficient like {FORTH}.  It
        is also {functional}, {dynamically typed}, {interactive}, with
        {garbage collection} like {LISP}, and the {syntax} is {block
        structured} like {Pascal}.
     
        ["Programming in POP-11", J. Laventhol ,
        Blackwell 1987].
     
        AlphaPop is an implementation for the {Macintosh} from
        Computable Functions Inc.  PopTalk and POPLOG from the
        University of Sussex are available for {VAX/VMS} and most
        {workstations}.
     
        E-mail: Robin Popplestone 
     
        (2003-03-25)