TRON is an open real-time operating system kernel design, and is an acronym for "The Real-time Operating system Nucleus". The project was started by Prof. Dr. Ken Sakamura of the University of Tokyo in 1984. The project's goal is to create an ideal computer architecture and network, to provide for all of society's needs.
The Industrial TRON (ITRON) derivative was one of the world's most used operating systems in 2003, being present in billions of electronic devices such as cellphones, appliances and even cars. The operating system is mainly used by Japanese companies, although interest in ITRON is growing worldwide. However, it has been said that there is much misinformation in the English speaking world about TRON due to the majority of the documentation being in Japanese.
TRON itself does not specify the source code for the kernel, but instead is a "set of interfaces and design guidelines" for creating the kernel. This allows different companies to create their own versions of TRON, based on the specifications, which can be suited for different microprocessors.
While the specification of TRON is publicly available, implementations can be proprietary at the discretion of the implementor.
The TRON framework defines a complete architecture for the different computing units:
- ITRON (Industrial TRON): an architecture for real-time operating systems for embedded systems; this is the most popular use of the TRON architecture
- BTRON (Business TRON): for personal computers, workstations, PDAs, mainly as the human-machine interface in networks based on the TRON architecture
- CTRON (Central and Communications TRON): for mainframe computers, digital switching equipment
- MTRON (Macro TRON): for intercommunication between the different TRON components.
- STRON (Silicon TRON): hardware implementation of a real-time kernel.
Character encoding 
In 1984, the TRON project was officially launched. A year later, in 1985, NEC announced the first ITRON implementation based on the ITRON/86 specification. In 1986 the TRON Kyogikai (unincorporated TRON Association) was established, Hitachi announced its ITRON implementation based on the ITRON/68K specification, and the first TRON project symposium is held. In 1987, Fujitsu announced an ITRON implementation based on the ITRON/MMU specification, Mitsubishi Electric announced an ITRON implementation based on the ITRON/32 specification, and Hitachi introduced the Gmicro/200 32bit microprocessor based on the TRON VLSI CPU specification. In 2004, the governor of Tokyo, Shintaro Ishihara mentioned "TRON was once killed by the former Minister of International Trade and Industry, Hashimoto, because he was at that time under the pressure of United States." This story is supported by an article on the TRON project website, citing Microsoft's lobbying against it.
The TRON project was administered by the TRON Association. It has been integrated into T-Engine Forum in 2010. TRON project activities have been taken over and continued by T-Engine Forum.
T-Engine Forum is a non-profit organization which develops open specifications for ITRON, T-Kernel and ubiquitous ID architecture. The chair of T-Engine Forum is Dr. Ken Sakamura. As of July, 2011 there are 266 members in T-Engine forum. Executive committee members includes top Japanese giants like Fujitsu, Hitachi, NTT DoCoMo and Denso. A-level members who are involved in design and development of specifications for T-Engine and T-Kernel, or of Ubiquitous ID technology includes companies likes eSOL, NEC and Yamaha Corporation. B-level members who are involved in development of product using T-Engine specification and T-Kernel includes companies like ARM, Freescale, MIPS Technologies, Mitsubishi, Robert Bosch GmbH, Sony Corporation, Toshiba and Xilinx. The supporting members and academic members involved with the forum includes many universities like University of Tokyo, Japan and Dalian Maritime University, China.
The MicroScript programming language is a graphically-oriented, high-level programming language created by Personal Media Corporation for TRON. It is similar to Apple Computer's HyperTalk. It is intended mainly for end users with little or no programming experience, yet is also used as a development tool by professional BTRON programmers to port software between TRON variants, and to easily and quickly write device drivers for hardware devices. MicroScript is based on, and makes extensive use of, the TRON Basic Text Editor, and Basic Figure Editor.
See also 
- "The TRON Project". TRON ASSOCIATION. Retrieved 2009-05-11.
- Linux News: Applications: The Most Popular Operating System in the World - By Jan Krikke LinuxInsider 10/15/03 3:57 AM PT
- "Japan's Homegrown Operating System | Science and Technology | Trends in Japan | Web Japan". Retrieved 2010-06-09.
- TRON’s No Failure.
- What TRON stands for
- Nakano, T; Utama A, Mitsuyoshi I, Shiomi A, Imai M (28 Nov-2 Dec 1995). "Hardware Implementation of a Real-Time Operating System". Tokyo, Japan. pp. 34–42.
- "Character Set List". jbrowse.com. Retrieved 2009 11 07.
- "TRON code website". tron.org. Retrieved 2009 11 07.
- Inayoshi H, Kawasaki I, Nishimukai T, Sakamura K (1988). "Realization of Gmicro/200". Micro, IEEE 8 (2): 12–21. doi:10.1109/40.526.
- "TRON News Items November 2004". TRON Web. Retrieved 2009-11-28.
- T-Engine, arguably the most advanced ubiquitous computing platform in the world
TRON Project 
- Tron.org home page in English
- T-Engine new home for the project
- TRON specifications TRON specifications in English
- TRON web
- TRON project at the Open Directory Project
- TRON introduction document
- B-Free in Japanese. Free BTRON OS project.
- EOTA in Japanese. Free BTRON "EOTA"
- BTRON introduction (preemptive multitasking feature mentioned amongst others)
- Seiko Brainpad TiPO Plus (URL translated to English / PC Watch article / PDA running BTRON / launched 1998 / 640x240 4-grayscale LCD, IrDA, PCMCIA Type II, 170 × 100 × 20 mm)
- Chokanji, aka Cho Kanji. From Personal Media Corporation (PMC) . A BTRON-specifications OS which runs on PC hardware. The PMC laptop "Cho Kanji Note W2B", announced on October 30 2003, includes a Cho Kanji partition with a full suite of productivity applications, including a word processor, spreadsheet, drawing software, card database software, communications software, and an e-mailer and browser . Chokanji V screenshot with English language kit.
- Pictures of laptops running Chokanji: