anchor.diff:  
   #### Mac
   . Operating System
  -.. Mac OS X (10.6.8)
  +.. Mac OS X (10.6 or later)
  +
   . Java
   .. Oracle JDK 8u45 link:http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html[Java SE 8 Development Kit]
  -.. OpenJDK
  +.. OpenJDK link:http://openjdk.java.net/install/index.html[Download instructions]
  +
   . Webbrowser
   .. Chrome link:https://www.google.com/chrome/browser/desktop/[for Mac OS X 10.6 or later]
  -.. Firefox 31
  +.. Firefox link:http://www.getfirefox.com[Firefox 31 or later]
   
   #### Linux / Windows
   . Operating System
   .. Windows 7/ (SP1)
   .. Fedora 21
  +
   . Java
   .. Oracle JDK 8u45 link:http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html[Java SE 8 Development Kit]
  -.. comparable OpenJDK
  +.. OpenJDK link:http://openjdk.java.net/install/index.html[Download instructions]
  +
   . Webbrowser
   .. Chrome 43 link:https://www.google.com/chrome/browser/desktop/[Windows 8/7 64-bit]
  -.. Firefox 31
  +.. Firefox link:http://www.getfirefox.com[Firefox 31 or later]
  +
   
   
   ## Setup Environments
  
positive.code: 
  . CPU
  .. x86 (Intel Pentium)
  .. x64 (i7 and comparable)
  
  . Memory
  .. 4 to 8 GB for attendees
  
negative.code: #### Mac
  . CPU
  .. PowerPC G4
  .. x64 (i5 and comparable)
  
  . Memory
  .. 4 to 8 GB for attendees
  .. 8 to 16 GB for instructors
  