Personally identifiable information (PII) refers to data that, either independently or when coupled with other information, has the potential to identify an individual in the physical world. Typically, two groups categorize PII: linked information and linkable information. Linked information comprises any specific personal data that can directly identify an individual. In contrast, linkable information, while not individually capable of identifying a person, has the potential to do so when combined with another piece of information, allowing for the identification, tracking, or locating of an individual.
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