Paul Kierstead responds:
As far as I can tell, the rule goes something like this: If it has
carving, it is Victorian. If it incorporates steel (or other "white"
metal) as part of the aesthetic, it is "Modern" or perhaps "art deco".
Otherwise it is Shaker.

Let's not forget Craftsman/Arts & Crafts/Mission if it has dark stain
and mostly straight lines.