whitelist

The term "whitelist" refers to a registry of approved entities—such as email addresses, IP addresses, or applications—that are granted specific privileges, access, or recognition, while all others are denied by default. Historically, the concept emerged in the late 19th and early 20th centuries in labor and trade contexts to identify trustworthy workers or approved shipping vessels. It was later adopted widely in computing and cybersecurity as a standard mechanism for access control.

Perspectives on the term's acceptability have diverged significantly in recent years. Those who continue to use the term often regard it as a deeply ingrained industry standard where the color metaphor represents "light/safe" versus "dark/dangerous" without intended racial subtext. However, linguists and advocates for inclusive language argue that the binary of "white is good" and "black is bad" reinforces unconscious racial bias. Consequently, major technology organizations, including Microsoft, Google, and the National Institute of Standards and Technology (NIST), have deprecated the term in favor of more precise, descriptive language.

Example:
"You will need to add the new server's IP address to the firewall whitelist before it can communicate with the database."

Example:
"The marketing team asked users to whitelist their domain to prevent newsletters from ending up in the spam folder."