1. binary numeration system a positional system of numeration that uses binary digits and a radix of two
  2. pure binary numeration system a positional system of numeration that uses binary digits and a radix of two
  3. binary number system a positional system of numeration that uses binary digits and a radix of two
  4. numeration system any notation for the representation of numbers
  5. octal numeration system a positional system of numeration that uses octal digits and a radix of eight
  6. decimal numeration system a positional system of numeration that uses decimal digits and a base of ten
  7. information system system consisting of the network of all communication channels used within an organization
  8. promotion system a system for advancing participants to higher-status positions
  9. refrigeration system a cooling system for chilling or freezing
  10. intercommunication system a communication system linking different rooms within a building or ship etc
  11. inertial navigation system a system to control a plane or spacecraft
  12. transportation system a facility consisting of the means and equipment necessary for the movement of passengers or goods
  13. air transportation system a transportation system for moving passengers or goods by air
  14. alliteration use of the same consonant at the beginning of each word
  15. propulsion system a system that provides a propelling or driving force
  16. telecommunication system a communication system for communicating at a distance
  17. fuel injection system mechanical system to inject atomized fuel directly into the cylinders of an internal-combustion engine; avoids the need for a carburetor
  18. communication system a system for communicating
  19. International 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)
  20. ventilation system a mechanical system in a building that provides fresh air