What non-metric systems of units have been used in science or engineering? I mean real systems, not hodge-podge collections of units. Where are these systems documented? I've seen references to the following:
British Absolute System British Gravitational System English Engineering System Foot-Pound System Inch-Pound System But there is very little information about what these "systems" are. In trying to promote the specification of SI in standards, I've made the point that if non-SI units are used, then a standard document should be referenced which defines the system and its use. Since such documents don't seem to exist, I then want to make the point that an engineering system of units needs to be specified, not just a vague term such as "inch-pound units." Ralph Gillmann Federal Highway Administration
