Yes, of course primarily categories. But my recollection is also functor. Here is an example from the web. It is funny that the reference to Kant is to the French usage: Saunders and I talked about the parallel use of terminology derived from Kant in the phenomenological school of literary criticism, as was then (1960's) fashionable. (My wife's PhD is in French literature, and some of our friends of yore were steeped in that tradition and language). /Funktor/ tam-ifadesi: Functor full-expression; /Funktor/ Vollaudsdruck (Carnap); expres- sion-entiere de fonctenr. *...* G?r?-kal?plar?? Forma of sensuous iutuition; reine Formen der sinnlichen Anschauung; formes de l'intuition sensible (/Kant/). G?>terge-a?zciikleri? Indicator /words/ (Goodman); Indikatorenw?rter; mots-indicateurs. [For admin and other information see: http://www.mta.ca/~cat-dist/ ]