1. accounting system a bookkeeper's chronological list of related debits and credits of a business; forms part of a ledger of accounts
  2. operating system (computer science) software that controls the execution of computer programs and may provide various services
  3. recording system audio system for recoding sound
  4. coding system a system of signals used to represent letters or numbers in transmitting messages
  5. economic system the system of production and distribution and consumption
  6. accounting entry a written record of a commercial transaction
  7. accentual system the system of accentuation used in a particular language
  8. computing system a system of one or more computers and associated software with common storage
  9. accounting firm a firm of accountants who provide accounting and auditing services for a fee
  10. accounting data all the data that support a financial statement
  11. contingent determined by conditions or circumstances that follow
  12. cooling system a mechanism for keeping something cool
  13. scoring system a system of classifying according to quality or merit or amount
  14. voting system a legal system for making democratic choices
  15. ignition system the mechanism that ignites the fuel in an internal-combustion engine
  16. banking system banks collectively
  17. control system a system for controlling the operation of another system
  18. writing system a method of representing the sounds of a language by written or printed symbols
  19. heating system utility to warm a building
  20. rating system a system of classifying according to quality or merit or amount