Copyright (c) 1991 Yale University Computer Science Department
 
 Yale Haskell System Version 2.0-beta
 
 Permission to copy this software, to redistribute it, and to use it for any
 purpose is granted, subject to the following restrictions and understandings.
 
 1. Any copy made of this software must include this copyright notice in full.
 2. All materials developed as a consequence of the use of this software
    shall duly acknowledge such use, in accordance with the usual standards
    of acknowledging credit in academic research.
 3. Yale has made no warrantee or representation that the operation of
    this software will be error-free, and Yale is under no obligation to
    provide any services, by way of maintenance, update, or otherwise.
 4. In conjunction with products arising from the use of this material,
    there shall be no use of the name of the Yale University nor of any
    adaptation thereof in any advertising, promotional, or sales literature
    without prior written consent from Yale in each case.