ISO/IEC JTC1/SC22/WG14 - C - Open-std

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Welcome to the official home of ISO/ IEC JTC1/SC22/WG14 - C 2025-11-10: projects | documents | issues | contributing | meetings | contacts

ISO/IEC   JTC1/SC22/WG14 is the international standardization working group for the programming language C.

The current C programming language standard (C23) ISO/IEC 9899 was adopted by ISO and IEC in 2024.

To obtain the international standard, please contact your national member body.

Work on projects and their milestones include:

  • WG14 has finished revising the C standard, under the name C23. A charter for the revision of the standard describes the rules for what has been done.
  • 9899: Programming Language C
  • Defect Reports and Record of Response
  • TR 18037: Embedded C
  • TR 19769: Extensions for the programming language C to support new character data types
  • TR 24731-1: Extensions to the C Library Part I: Bounds-checking interfaces
  • TR 24731-2: Extensions to the C Library Part II: Dynamic allocation functions
  • TR 24732: Extensions for the programming language C to support decimal floating point arithmetic
  • TR 24747: Programming language C - Extensions for the C language library to support mathematical special functions
  • The rationale for the ANSI C89 standard is available.
  • The rationale for the C99 standard is available.
Other information available is:
  • The WG document register including the documents
  • Information on WG meetings
  • WG14 Business Plan and Convener's Report 2020
  • mailings and meetings information
  • Informal Study Group Organization Information
  • ISO/IEC 2382:2015 Information technology — Vocabulary (freely available standard)
  • Contacts
  • C language homepage

WG14 members attending the Strasbourg meeting in-person for the finalization of C23 (names are from left-to-right):

A group of fourteen people standing on the steps of the eXplora building at the historic site of the old Hôpital Civil in Strasbourg, France
Front row: Jens Gustedt, JeanHeyd Meneide Second row: Alex Celeste, Freek Wiedijk Third row: Robert Seacord, Philipp Klaus Krause, Martin Uecker, Ori Bernstein Fourth row: Dave Banham, Daniel Plakosh, Aaron Bachmann, Henry Kleynhans Back row: Chris Bazley, Jakub Łukasiewicz Photo Credit: Unattributed at request of the photographer

If you want further information, or want to participate, please contact your national member body or one of the contact addresses of the WG. 2025-11-10: projects | documents | issues | contributing | meetings | contacts

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