List of ISO standards
... of names of languages – Part 1: Alpha-2 code ISO 639-2 Codes for ... of names of languages – Part 2: Alpha-3 code ISO/IEC 646 internationalized 7 ... first published in 1974 ISO 3166-1 alpha-2 two-letter country codes ISO 3166-1 alpha-3 three-letter country codes ISO 3166-1 numeric ISO 3166-2 principal subdivisions of ...
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Telegraphy
... keying, as opposed to the earlier radio technique using a spark gap). Telegraphy messages sent ... With the invention of the teletypewriter, telegraphic encoding became fully automated. Early teletypewriters used Baudot ... links were the first established by government postal and telegraph services (PTTs). The most common ... 12 bits per second. No current (2006) encoding system approaches this theoretical limit, even with ... is one's e-mail address with numeric or alpha prefixes specifying one's ...
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