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Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Specification, functional model and information flows - Call Identification and Call Linkage Additional Network Feature. Original standard ISO IEC 21888-2001 in PDF full version. Additional info + preview on request

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Information technology - Telecommunications and information exchange between systems - Private Integrated Services Network - Inter-exchange signalling protocol - Call Identification and Call Linkage Additional Network Feature. Original standard ISO IEC 21889-2001 in PDF full version. Additional info + preview on request

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Information technology - Destruction of data carriers - Part 1- Principles and definitions. Original standard ISO IEC 21964-1-2018 in PDF full version. Additional info + preview on request

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Information technology - Destruction of data carriers - Part 2- Requirements for equipment for destruction of data carriers. Original standard ISO IEC 21964-2-2018 in PDF full version. Additional info + preview on request

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Information technology - Destruction of data carriers - Part 3- Process of destruction of data carriers. Original standard ISO IEC 21964-3-2018 in PDF full version. Additional info + preview on request

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Information technology - Upper level ontology for smart city indicators. Original standard ISO IEC 21972-2020 in PDF full version. Additional info + preview on request

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