Listview columns show a number but the meaning is not shown
There is some data in a listview where the exact meaning of an integer is not clear.
There is a text file called stsvs.txt located in the Continuum folder that can be viewed to explain the integer to text relationship for many types of object.
An example is Activity "CallerCode" which only returns an integer value.
Searching the "stsvs.txt" files shows the equivalent text.