Source : Free On-Line Dictionary of Computing

first class module
     
         A {module} that is a {first class data object}
        of the {programming language}, e.g. a {record} containing
        {functions}.  In a {functional language}, it is standard to
        have first class programs, so program building blocks can have
        the same status.
     
        {Claus Reinke's Virtual Bookshelf
        (http://www.informatik.uni-kiel.de/~cr/bib/bookshelf/Modules.html)}.
        {Mark Jones' home page
        (http://www.cs.nott.ac.uk/Department/Staff/mpj/)}.
     
        (1997-06-17)