Combined Columns on a List Object

In the default Addresses expanded list, there is a column called "Full address" which combines all of the different parts of the contact address object into one, and cannot be edited directly, such as in the following screenshot.

I'm having trouble figuring out how this is implemented, as I would like to do something similar for another object. Any help would be appreciated, because I cannot seem to think of a search term that would pull up a relevant article on the subject.

Thanks in advance for any help!