Develop fluency in object-oriented design. We study semantics of object-oriented languages, strengths and limitations of the object-oriented approach, processes that can lead to good design outcomes, graphical and textual representations for design including UML, common problems and some of the patterns that can solve them, and refactoring. Students develop an ability to read and critique designs, and to clearly present and advocate design ideas. Students work in teams to complete a multi-phase design project.(3 credits)