Multibox
The MultiBox field introduced in version 7 had its functionality extended in 7.2 to include a multiple field drop down choice and relationship overried.
The Multibox is a more powerful version of the Automatic List Box, as it obtains its values from a related table, rather than a hard-coded list of choices. The MultiBox allows you to retrieve and display several items of information – extremely useful in providing users with sufficient information to positively identify the correct item, when one item of data might not be sufficient.