Information technology; Portable Operating System Interface (POSIX); part 1: System Application Program Interface (API) [C language] (ISO/IEC 9945-1-1990); English version EN 29945-1:1993
German title
Informationstechnik; Betriebssystem-Schnittstelle für die Austauschbarkeit von Systemen (POSIX); Teil 1: Schnittstelle zwischen System und Anwendungsprogramm (API) [Sprache C] (ISO/IEC 9945-1:1990); Englische Fassung EN 29945-1:1993
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