# ISO/IEC 9945-1:1990 — Withdrawn and superseded ISO standards

For ISO/IEC 9945-1:1990, item title is Information technology — Portable Operating System Interface (POSIX) — Part 1: System Application Program Interface (API) [C Language]; status code is 9599; successor is ISO/IEC 9945-1:1996; withdrawn / published date is 1990-12-06, recorded from its source on 2026-08-05.

- **Identifier:** ISO/IEC 9945-1:1990 _(verified: appears in the quote below)_
- **Item title:** Information technology — Portable Operating System Interface (POSIX) — Part 1: System Application Program Interface (API) [C Language] _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/IEC 9945-1:1996
- **Withdrawn / published date:** 1990-12-06 _(verified: appears in the quote below)_

## What the source says

> 17840,IS,,ISO/IEC 9945-1:1990,Information technology — Portable Operating System Interface (POSIX) — Part 1: System Application Program Interface (API) [C Language],Technologies de l'information — Interface pour la portabilité des systèmes (POSIX) — Partie 1: Interface programme de systèmes d'application (API) [Langage C],1990-12-06,1,['35.060'],ISO/IEC JTC 1/SC 22,9599,,[24426],['en'],356,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).