Hello Phil M,
Although not documented (I think), you can get at a department description in the same way that would can get an account desciption. then formula is:
code:
=ADGET("gldept.DESC","deptkey")
where:
"gldept.DESC" references the department file and requests the description -and-
"deptkey" is a string that contains the department code (or a cell that contains this string value).
If you "drag and drop" a departmental comparative, or take a look at "GL!deptdemo.sam", you'll see how the department name is retrieved from the department code.