Final answer:
Organizational members of a firm are categorized into insiders and outsiders within the insider-outsider model, with insiders being familiar with the firm's processes and culture, and outsiders being new or prospective employees.
Step-by-step explanation:
The two categories that organizational members of a firm fit into are typically referred to as the insider-outsider model. In this context, insiders are those already working for the firm who are familiar with its procedures and culture, whereas outsiders refer to recent or prospective hires who are not yet fully integrated into the organizational structure.
It's important to note that the categorization of organizational members can also be looked at from different perspectives, such as normative/voluntary, coercive, and utilitarian organizations, depending on the reasons why individuals join and engage with the organization.