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Information technology - Open systems interconnection - Part 2- The Directory- Models - Amendment 1. Original standard ISO IEC 9594-2-2020 amd1-2021 in PDF full version. Additional info + preview on request

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Information technology - Open systems interconnection - Part 2- The Directory- Models - Amendment 2- Miscellaneous enhancements. Original standard ISO IEC 9594-2-2020 amd2-2025 in PDF full version. Additional info + preview on request

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Information technology - Open systems interconnection - Part 3- The Directory- Abstract service definition. Original standard ISO IEC 9594-3-2020 in PDF full version. Additional info + preview on request

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Information technology - Open systems interconnection - Part 3- The Directory- Abstract service definition - Amendment 1- Miscellaneous enhancements. Original standard ISO IEC 9594-3-2020 amd1-2025 in PDF full version. Additional info + preview on request

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Information technology - Open systems interconnection - Part 4- The Directory- Procedures for distributed operation. Original standard ISO IEC 9594-4-2020 in PDF full version. Additional info + preview on request

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Information technology - Open systems interconnection - Part 4- The Directory- Procedures for distributed operation - Amendment 1- Miscellaneous enhancements. Original standard ISO IEC 9594-4-2020 amd1-2025 in PDF full version. Additional info + preview on request

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