# ISO/IEC TS 18661-2:2015 — Withdrawn and superseded ISO standards

For ISO/IEC TS 18661-2:2015, item title is Information Technology — Programming languages, their environments, and system software interfaces — Floating-point extensions for C — Part 2: Decimal floating-point arithmetic; status code is 9599; withdrawn / published date is 2015-02-11, verified against its source on 2026-08-05.

- **Identifier:** ISO/IEC TS 18661-2:2015 _(verified: appears in the quote below)_
- **Item title:** Information Technology — Programming languages, their environments, and system software interfaces — Floating-point extensions for C — Part 2: Decimal floating-point arithmetic _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/IEC TS 18661-2:2015 _(verified: appears in the quote below)_
- **Withdrawn / published date:** 2015-02-11 _(verified: appears in the quote below)_

## What the source says

> 65614,TS,,ISO/IEC TS 18661-2:2015,"Information Technology — Programming languages, their environments, and system software interfaces — Floating-point extensions for C — Part 2: Decimal floating-point arithmetic","Technologies de l'information — Langages de programmation, leurs environnements et interfaces du logiciel système — Extensions à virgule flottante pour C — Partie 2: Arithmétique décimal en virgule flottante",2015-02-11,1,['35.060'],ISO/IEC JTC 1/SC 22,9599,,[68882],['en'],50,"<p>ISO/IEC/TS 18661-2:2015 extends programming language C as specified in ISO/IEC 9899:2011, (C11) with changes specified in ISO/IEC/TS 18661-1, to support decimal floating-point arithmetic conforming to ISO/

## 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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).