MKS System Units describe a system of measurement based on the fundamental units of meter (length), kilogram (mass), and second (time). They are widely used in scientific and engineering fields. Derived units include Newton (force), Joule (energy), Watt (power), and Pascal (pressure), which are closely related to the base units. The International Bureau of Weights and Measures (BIPM) and the National Institute of Standards and Technology (NIST) play key roles in maintaining and developing measurement standards for MKS units. Related concepts include scientific notation, dimensional analysis, and order of magnitude.