Professional Computer is an odd unit - it has 6 lectures on profressional ethics at the start, but the main focus is on the team project. The project is a semester-long task for (generally) a CS lecturer, and these days is usually just PHP plus MySQL.
Although it has been possible in the past to not do the essay and still pass, you now require 40% in both the project and the essay to pass the unit 
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[http://handbooks.uwa.edu.au/units/cits/cits3200 Handbook link]
