A file organization that contains a reference number is called

A file organization that contains a reference number is called "indexed access". In this type of file organization, each record in the file is assigned a unique reference number, also known as an index. The reference number acts as a pointer to the location of the actual data in the file, making it easier and faster to retrieve specific records. Think of it like an index in a book. Just like how you can use the index in a book to quickly find information on a specific topic, you can use the reference numbers in an indexed access file to quickly find the data you need.