What is a ledger? Processes and manages algorithms across many machines in a computing environment. Records classified and summarized transactional data. Simply means unchangeable. Is a type of distributed ledger, consisting of blocks of data. What is data visualization? Occurs when the user goes into an emotional state of overanalyzes (or overthinking) a situation so that a decision or action is never taken, in outcome. Describes technologies that allow users to see or visualize data to transform information into a business perspective. Presents the results of data analysis, displaying the patterns, relationships, and trends in a graphical format. A business analytics specialist who uses visual tools to help people understand complex data..