There are currently 4 main resource categories. Hovering over resource icon displays amounts produced and spent over the last 30 days:
Raw resources comprehend varieties of product that don't need any crafting to be obtained, although some of them need specialized buildings to be produced.
This category comprehends all non-food resources that need to be crafted in order to obtain, which can be done either in workshop or specialized buildings.
This category comprehend all resources that have nutritional value, plus alcoholic beverages, being therefor able to feed your population and/or increase happiness.