| Required Reading:  Felleisen, Findler, Flatt, Gray, Krishnamurthi, Proulx How to Design Classes 2009, available from NU Bookstore 
 Recommended Readings:  Gamma, Helm, Johnson, Vlissides  Design Patterns - Elements of Reusable Object-Oriented Software. Addison Wesley, 1995 a comprehensive study of design patterns Felleisen, Findler, Flatt, Krishnamurthi  How to Design Programs. MIT Press, 2001 Part 1 is highly recommended for those that did not 
      take CSU 211 Felleisen, Friedman  A Little Java, A Few Patterns. MIT Press, 1998 why all what is in HtDP matters and how it scales to Java 
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