Where do you list authors on postcards? I have some postcards with Famous people on them; some are musicians like Strauss so I will put that one in Music. Others are people I know as authors--Gide, Dostoyevsky, etc. When others list these cards, so you put them in the country of the author's nationality? In profession, other? In Philosophy (Gide and good ol' Fyodor could be seen as such. . . ) Real Photo, if they're photographs (even reproduced photos, not "real photo postcards"?)

I often see 'Literature' or 'Books' in dealers categories in the US; perhaps this could be a new category?

Thanks for any suggestions.