1.A dichotomous key that distinguishes the two gram-positive phyla Firmicutes and Actinobacteria
2.A dichotomous key that distinguishes the remaining bacteria phylaPlantomycettes, Chlamydaie,Spirochaetes, Bacteroidetes, Fusobacteria.
3.A dichotomous key that distinguishes the following archaea groupings: Thermophiles, Halophiles, Acidophiles, and Methanogens.