  Olympiodorus adopts the view of Iamblichus that the subject-matter (skopos) of the Categories is speech signifying things by the mediation of thoughts (Proleg. 21,101–3; in Cat. 28,25ff), which conforms with the basic interpretation of the Categories in the school of Alexandria. Formally, too, the commentary resembles more than his other commentaries on Aristotle do the standard format familiar from other Neoplatonic commentators on Aristotle. Unlike the commentary on the Meteorology, which displays the typically Olympiodorean structure of being divided into praxeis which are then subdivided into longer expositions of the meaning of the passage under discussion (theôriai) and more detailed analyses of the text (lexeis), the commentary on the Categories is simply divided into theôriai (which don’t seem to be further subdivided).