     <dt><a href="http://www.boost.org/people/beman_dawes.html">Beman Dawes</a></dt>

      <dd>Contributed <cite><a href=
      "operators_test.cpp">operators_test.cpp</a></cite>.</dd>

      <dt><a href="http://www.boost.org/people/daryle_walker.html">Daryle Walker</a></dt>

      <dd>Contributed classes for the shift operators, equivalence, partial
      ordering, and arithmetic conversions. Added the grouped operator
      classes. Added helper classes for input and output iterators.</dd>

      <dt>Hel