Which one of the following is an example of an operating System? A) Microsoft Word B) Microsoft Excel C) Microsoft Access D) Microsoft Windows Related MCQs: Designers use which of the following to tune the performance of systems to support time-critical operations? Which one of the following is not a function of the network layer? Which of the following statements are incorrect with reference to web-based systems? Which of the following is a risk associated with using hypertext in web applications?