# ISO 9074:1989/Amd 1:1993 — Withdrawn and superseded ISO standards

For ISO 9074:1989/Amd 1:1993, item title is Information processing systems — Open Systems Interconnection — Estelle: A formal description technique based on an extended state transition model — Amendment 1; status code is 9599; successor is ISO/IEC 9074:1997; withdrawn / published date is 1993-11-18, recorded from its source on 2026-08-05.

- **Identifier:** ISO 9074:1989/Amd 1:1993 _(verified: appears in the quote below)_
- **Item title:** Information processing systems — Open Systems Interconnection — Estelle: A formal description technique based on an extended state transition model — Amendment 1 _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/IEC 9074:1997
- **Withdrawn / published date:** 1993-11-18 _(verified: appears in the quote below)_

## What the source says

> 16660,IS,Amd,ISO 9074:1989/Amd 1:1993,Information processing systems — Open Systems Interconnection — Estelle: A formal description technique based on an extended state transition model — Amendment 1,Systèmes de traitement de l'information — Interconnexion de systèmes ouverts — Estelle: Technique de description formelle basée sur un modèle de transition d'état étendu — Amendement 1,1993-11-18,1,['35.100.01'],ISO/IEC JTC 1,9599,,[24403],['en'],53,

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Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).