1. file system a system of classifying into files
  2. fuel system equipment in a motor vehicle or aircraft that delivers fuel to the engine
  3. value-system the principles of right and wrong that are accepted by an individual or a social group
  4. vowel system the system of vowels used in a particular language
  5. feudal system the social system in which vassals were protected by lords
  6. phone system a communication system that transmits sound between distant points
  7. filing system a system of classifying into files
  8. ecosystem organisms interacting with their physical environment
  9. visual system the sensory system for vision
  10. railway system line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight
  11. cable system a television system that transmits over cables
  12. solar system the sun with the celestial bodies that revolve around it
  13. water system a river and all of its tributaries
  14. tone system the system of tones used in a particular language or dialect of a tone language
  15. system a group of independent elements comprising a unified whole
  16. SI system a complete metric system of units of measurement for scientists; fundamental quantities are length (meter) and mass (kilogram) and time (second) and electric current (ampere) and temperature (kelvin) and amount of matter (mole) and luminous intensity (candela)
  17. social system the people in a society considered as a system organized by a characteristic pattern of relationships
  18. spoils system the system of employing and promoting civil servants who are friends and supporters of the group in power
  19. sewer system facility consisting of a system of sewers for carrying off liquid and solid sewage
  20. power system a system of high tension cables by which electrical power is distributed throughout a region