All the cuts on a bump key are made to the maximum depth, so any key blank can be made into a bump key. Bump keys are manufacturer-specific. A Kwikset lock requires a bump key made from a Kwikset key. The same is true for other lock brands. So, a full set of bump keys would include one for each of the major lockset manufacturers.
However, in 1977, Carl Woese, a microbiologist and physicist discovered significant differences between some of the prokaryotes. These differences were so significant that the prokaryotes were separated into two separate domains: Archaea and Bacteria, and hence two kingdoms: Archaea and Eubacteria.
Linnaeus used this as the top rank, dividing the physical world into the plant, animal and mineral kingdoms. As advances in microscopy made classification of microorganisms possible, the number of kingdoms increased, five and six-kingdom systems being the most common. Domains are a relatively new grouping. The three-domain system was first proposed in 1990, but not generally accepted until later.