Questions: 1. How are different software programs produced? 2. How are different operating systems produced? 3. What is an operating system and how is an operating system used? 4. What are the different types of operating systems? 5. What is Mac OS X? Key Terms: Operating Systems Mac OS X Software Coding Design Programming Information Technology Artificial Intelligence Citations: 1. Dejan Milojicic, Kirk Bresniker, Gary Campbell, Paolo Faraboschi, John Paul Strachan, Stan Williams, "Computing In-Memory Revisited", Distributed Computing Systems (ICDCS) 2018 IEEE 38th International Conference on , pp. 1300-1309, 2018. 2. Harish C. Rajput, Abbas S. Milani, Andrew Labun, "Including time dependency and ANOVA in decision-making using the revised fuzzy AHP: A case study on wafer fabrication process selection", Applied Soft Computing , vol. 11, pp. 5099, 2011. 3. Ognjen Orel, Boris Matijasevic, Hrvoje Roncevic, "Monitorin