3. Look up the Therac-25, and write a short paragraph (2-3 sentences) explaining what the device is, and what went wrong with it.

4. Although Android uses the Java language, there is a key difference between Android devices and using Java on a PC. What is it?

5. If you turn this assignment in, and have no absences in class (excluding emergencies and illnesses discussed with me) consider this your perfect attendance reward!