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trailer

/ˈtɹeɪlə(ɹ)/ /ˈtɹeɪlɚ/
Visual illustration of trailer: Part of an object which extends some distance beyond the main body of the object.
noun

Part of an object which extends some distance beyond the main body of the object.

partvehicle
Visual illustration of trailer: The final record of a list of data items, often identified by a key field with an otherwise invalid value that sorts last alphabetically (e.g., “ZZZZZ”) or numerically (“99999”); especially common in the context of punched cards, where the final card is called a trailer card.
noun

The final record of a list of data items, often identified by a key field with an otherwise invalid value that sorts last alphabetically (e.g., “ZZZZZ”) or numerically (“99999”); especially common in the context of punched cards, where the final card is called a trailer card.

computingtechnologyitemlistmachine