Gives terms and definitions in English, French, Russian and Spanish as well as indexes in Dutch, English, French, German, Italian, Polish, Russian, Spanish, and Swedish.
IEC 60050-721:1991 history
2021IEC 60050-721:1991/AMD5:2021 Amendment 5 - International Electrotechnical Vocabulary (IEV) - Part 721: Telegraphy, facsimile and data communication
2019IEC 60050-721:1991/AMD4:2019 Amendment 4 - International Electrotechnical Vocabulary (IEV) - Part 721: Telegraphy, facsimile and data communication
2018IEC 60050-721:1991/AMD3:2018 Amendment 3 - International Electrotechnical Vocabulary (IEV) - Part 721: Telegraphy, facsimile and data communication
2017IEC 60050-721:1991/AMD2:2017 Amendement 2 - International electrotechnical vocabulary - Part 721: Telegraphy, facsimile and data communication
2016IEC 60050-721:1991/AMD1:2016 Amendement 1 - International electrotechnical vocabulary - Part 721: Telegraphy, facsimile and data communication
1991IEC 60050-721:1991 International electrotechnical vocabulary; chapter 721: telegraphy, facsimile and data communication