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PTTs (Postal

См. также в других словарях:

  • Postal, telegraph and telephone service — A postal, telegraph, and telephone service (or PTT) is a government agency responsible for postal mail, telegraph, and telephone services. Such monopolies existed in many countries, though not in North America or Japan. Many PTTs have been… …   Wikipedia

  • Telegraphy — (from the Greek words (τηλε) = far and (γραφειν) = write) is the long distance transmission of written messages without physical transport of letters. Radiotelegraphy or wireless telegraphy transmits messages using radio. Telegraphy includes… …   Wikipedia

  • Protein targeting — This article deals with protein targeting in eukaryotes except where noted. Protein targeting or protein sorting is the mechanism by which a cell transports proteins to the appropriate positions in the cell or outside of it. Sorting targets can… …   Wikipedia

  • X.400 — is a suite of ITU T Recommendations that define standards for Data Communication Networks for Message Handling Systems (MHS) more commonly known as email . At one time X.400 was expected to be the predominant form of email, but this has role has… …   Wikipedia

  • Packet switched network — A Packet Switched Network, or PSN, refers to the packet switched networks that existed before the Internet. The history of such networks can be divided into three eras:early networks before the introduction of X.25 and OSI,the X.25 era when many… …   Wikipedia

  • CEPT — Bundesdeutsche Europa Briefmarke von 1968 Die Conférence Européenne des Administrations des Postes et des Télécommunications (CEPT, Europäische Konferenz der Verwaltungen für Post und Telekommunikation) ist eine Dachorganisation zur… …   Deutsch Wikipedia

  • Conférence Européenne des Administrations des Postes et des Télécommunications — Bundesdeutsche Europa Briefmarke von 1968 Europa Briefmarke von 1984 …   Deutsch Wikipedia

  • European Radiocommunications Office — Bundesdeutsche Europa Briefmarke von 1968 Die Conférence Européenne des Administrations des Postes et des Télécommunications (CEPT, Europäische Konferenz der Verwaltungen für Post und Telekommunikation) ist eine Dachorganisation zur… …   Deutsch Wikipedia

  • CEPT — Saltar a navegación, búsqueda sello alemán La Conferencia Europea de Administraciones de Correos y Telecomunicaciones (CEPT, siglas de su nombre en francés Conférence européenne des administrations des postes et des télécommunications) es un… …   Wikipedia Español

  • Conferencia Europea de Administraciones de Correos y Telecomunicaciones — sello alemán. La Conferencia Europea de Administraciones de Correos y Telecomunicaciones (CEPT, siglas de su nombre en francés Conférence européenne des administrations des postes et des télécommunications) es un organismo internacional que… …   Wikipedia Español

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