Source : Free On-Line Dictionary of Computing

Bird-Meertens Formalism
     
         (BMF) (Or "Squiggol") A calculus for
        derivation of {functional program}s from a specification.  It
        consists of a set of {higher-order function}s that operate on
        lists including {map}, {fold}, {scan}, {filter}, inits, tails,
        {cross product} and {function composition}.
     
        ["A Calculus of Functions for Program Derivation", R.S. Bird,
        in Res Topics in Fnl Prog, D. Turner ed, A-W 1990].
     
        ["The Squiggolist", ed Johan Jeuring, published irregularly by
        CWI Amsterdam].
     
        (1995-05-01)