Automation does not necessarily supplant human activity but rather changes it, often in ways unintended and unanticipated by the designers of automation, and as a result poses new coordination demands on the human operator. (Parasuraman, Sheridan, & Wickens, 2000, p. 286) Tool use is a fundamental aspect of the human condition. Tally sticks, clay tablets, abaci, punch cards, typewriters, and digital computers represent external media that humans have relied upon to more simply, or more efficiently, meet their intellectual and behavioral objectives. It is only recently, however, that technology has become a coequal partner in service of those cognitive goals. The partnership between physiology and technology warrants a reconsideration of what it means to be a successful agent in this environment. One perspective on this problem is provided by an analysis of the qualities of the internet: examining the various ways that technological affordances enable, constrain, and alter memory behavior. Marsh and Rajaram (2019) discuss properties of the internet that have consequences for cognition, such as its relative omniscience, widespread access, and fast information retrieval. Another perspective emphasizes the transactive nature of the relationship between human and technology: the presence of high-tech external memory devices such as the internet shapes the manner in which we can achieve our intellectual goals and, simultaneously, our queries and contributions shape the nature of the information it possesses and provides to others. How do we conceptualize the cognition of the human-machine extended organism to best understand the inherent qualities or liabilities of human memory and cognition in a digital ecology?