Final answer:
In the insider-outsider model, internal users (insiders) are current employees familiar with a firm's procedures, while external users (outsiders) include recent or prospective hires without this familiarity.
Step-by-step explanation:
When examining the insider-outsider model within a firm, we can identify two distinct groups of users based on their relationship and familiarity with the firm's procedures and practices. Internal users are those individuals who are currently working within the firm, sometimes referred to as "insiders." These insiders possess an intimate knowledge of the firm's operations, culture, and procedures. In contrast, external users are individuals who are not currently part of the firm; these may include recent or prospective hires, sometimes referred to as "outsiders." They are not yet familiar with the inner workings of the firm and thus do not have the same level of knowledge as internal users.