1003.1-2001/Cor 2-2004 is a technical corrigendum for the Portable Operating System Interface (POSIX(TM)) family, issued to correct and refine the base 1003.1-2001 specification. It is relevant to engineers and organizations working with operating system interfaces, where precise behavior, conformance language, and interoperability matter. As a superseded standard, 1003.1-2001/Cor 2-2004 remains useful for understanding the documented revisions and the historical development of POSIX requirements.

Overview of 1003.1-2001/Cor 2-2004

This document serves as Technical Corrigendum 2 for IEEE 1003.1-2001, helping clarify or correct portions of the POSIX interface specification. In practical terms, it supports consistent interpretation of operating system services, application portability, and conformance expectations across implementations. For teams maintaining legacy systems or reviewing historical requirements, 1003.1-2001/Cor 2-2004 provides an important reference point for the corrected text and the technical context behind the POSIX standard.

Typical use cases

1003.1-2001/Cor 2-2004 is commonly consulted when reviewing UNIX-like operating system interfaces, software portability requirements, and compliance documentation tied to POSIX behavior. It may be used in systems engineering, platform qualification, and legacy application support where exact wording in the standard affects implementation decisions. The document is also relevant for technical libraries, kernel-adjacent interfaces, and environments that depend on predictable file, process, and utility behavior.

Why it matters

Technical corrigenda like 1003.1-2001/Cor 2-2004 matter because small wording changes can affect conformance, testing, and software compatibility. For procurement and compliance work, the corrected text helps reduce ambiguity when comparing implementations or verifying requirements. It also supports more reliable design decisions by giving teams a stable reference for what the standard intended after revision. For legacy engineering, that can lower integration risk and improve consistency across platforms.

• POSIX technical corrigendum
• Corrected IEEE 1003.1-2001 text
• Operating system interface requirements
• Portability and conformance reference
• Superseded historical standard