Lets say i have the category : hardware

hardware has its subcategories: printers,servers,screens,desktops,laptops and so on.

Now lets say i select

Hardware with subcat: desktop

i want to to have following text in the description box:

serial-number:

pc-name:

brand: 

if i select an other subcategory i want it to automatically adjust the text in the description.

Now is there an other functionality that does the same? Or can i create a plug-in to do this?