I found some:Toby said:Great! Thanks for the tip - will get searching
Kelly B said:There are two possibilities, though I assume Gil's is right, and the reference from Agnes indicates the same thing.
A horizontal or vertical machining center in Gil's link refers to the orientation of the spindle of a milling machine setup (a machine tool for cutting metal shapes). A factory or machine shop may have a large number of these in varying types.
On the other hand, horizontal or vertical manufacturing center refers to the organization of work within a factory. I forget what the difference is.