TRON is a real-time operating system kernel. TRON is an acronym for "The Real-time Operating system Nucleus". The project started by Dr. Ken Sakamura of the University of Tokyo in 1984. Its aim is to create an ideal computer architecture.

The TRON framework define a complete architecture for the different computing units:

  • ITRON: for intelligent units and product line robots, Industry Tron
  • BTRON: for workstation and HMI, Business Tron
  • CTRON: for computing computers, Computing Tron
  • MTRON: for intercommunication between the different Tron components,

At 2003 the TRON system is the world most used OS, being present in millions of electronic devices.

The specification of the TRON is open, but the source is not open. The TRON project permits the source to be protected and closed from the standpoint of the Intellectual Property.

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TRON is also a debugging command in the BASIC programming language. It is an abbreviation of TRace ON. It is used primarily for debugging line-numbered BASIC GOTO and GOSUB statements. When the TRON command had been executed, a window would indicate the line number being executed at that instant.

There is also a troff, or TRace OFF, command; it was used for turning the tracing off.