So people weren't using hundreds of different systems made by themselves
No. The early systems of measurement were not as accurate as those I use today. The systems of measurement I use today are substantially more accurate than the early systems of bygone days were.
Flowmeters need to be calibrated to ensure accurate measurement. To accomplish this, proving systems are developed to reduce the uncertainty associated with meter performance.
Nielsen ratings are the audience measurement systems developed by the Nielsen Company, in an effort to determine the audience size and composition of television programming in the United States.
Food exchange systems were originally developed for people with Diabetes.
All work measurement systems are based on the same, simple three-stage procedure: analysis, data collection and measurement, and synthesis.
Nielsen ratings are the audience measurement systems developed by the Nielsen Company, in an effort to determine the audience size and composition of television programming in the United States.
SM
two units of measurements are MKS and CGS systems
Measurement Systems Analysis
They are both systems of measurement except that the metric system is simpler and used by the majority of the world.
post script was developed by Adobe systems.
Are P2P systems developed by Apple or Google