In this module, we start our journey down the Stack to explain the world of informatics and health IT. We explore the top four levels of the Stack (World, Organization, Roles, and Functions), and then proceed to discuss new US medical-care (“World”) policies that drive health care Organizations to change practice, so they can accomplish their core Functions. We also discuss the history of health IT in relation to such policies in the past. We begin a course-long discussion of interoperability (which occurs at each level of the Stack), and privacy/confidentiality/security. We end with an explication of methods used to Evaluate whether an IT project has achieved the Organizational goals set for that project.

In this module, we continue the journey, starting with the role of needs, requirements, and specifications. We then turn to how workflow issues are turned into requirements and how information systems, built to satisfy those requirements, are assembled. We close with the cautionary notes of how poorly built systems harm the very workflows they were designed to improve.

This module concludes our journey with discussions of Data, Information, Knowledge, and Technology. Regarding data, we discuss their sources and types and provide examples. We go on to explain differences between information and data, and between knowledge and information. Standards are most important at this level, and we discuss the exchange of text and imaging data. Regarding technology, we use the Hype Cycle as a way for you to keep track of what new technologies are doing what and when. We close with a framework for thinking about careers in health IT and informatics.