Which term refers to a dataset that identifies a data type with a three-letter code?

• A. Items
• B. Master Files
• C. Contacts
• D. Values

Answer: (B)

Master files are the central reference datasets that describe core kinds of data used across the system. These files typically hold stable, foundational information about entities, and each data type within them is often identified by a concise, three-letter code. That code lets software quickly recognize what kind of data a record represents, making data routing and interpretation efficient and consistent across different modules. Because of this role as a cross-cutting reference with compact type identifiers, master files best fit the description. The other options point to more specific or transactional data (like individual items, contact records, or raw values) and aren’t primarily used as central reference datasets with three-letter type codes.