# ISO/IEC TS 18661-4:2015 — Withdrawn and superseded ISO standards

For ISO/IEC TS 18661-4:2015, item title is Information Technology — Programming languages, their environments, and system software interfaces — Floating-point extensions for C — Part 4: Supplementary functions; status code is 9599; successor is ISO/IEC TS 18661-4:2025; withdrawn / published date is 2015-10-06, recorded from its source on 2026-08-05.

- **Identifier:** ISO/IEC TS 18661-4:2015 _(verified: appears in the quote below)_
- **Item title:** Information Technology — Programming languages, their environments, and system software interfaces — Floating-point extensions for C — Part 4: Supplementary functions _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/IEC TS 18661-4:2025
- **Withdrawn / published date:** 2015-10-06 _(verified: appears in the quote below)_

## What the source says

> 65616,TS,,ISO/IEC TS 18661-4:2015,"Information Technology — Programming languages, their environments, and system software interfaces — Floating-point extensions for C — Part 4: Supplementary functions","Technologies de l'information — Langages de programmation, leurs environnements et interfaces du logiciel système — Extensions à virgule flottante pour C — Partie 4: Fonctions supplémentaires",2015-10-06,1,['35.060'],ISO/IEC JTC 1/SC 22,9599,,[83622],['en'],31,<p>ISO/IEC TS 18661-4:2015 extends programming language C to include functions specified and recommended in ISO/IEC/IEEE 60559:2011.</p>

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).