Category:Industry in Ontario Subcategories This category has the following 5 subcategories, out of 5 total. A Agriculture in Ontario (2 C, 3 P)B Industrial buildings in Ontario (3 C, 9 P)H Industrial history of Ontario (9 C, 2 P)M Manufacturing in Ontario (1 C, 2 P)P Petroleum industry in Ontario (2 C, 1 P)
