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  2. Oi (telecommunications) - Wikipedia

    en.wikipedia.org/wiki/Oi_(telecommunications)

    Oi Fixo (landline service, formerly Telefone Telemar) Oi Móvel (mobile service, cornerstone of the Oi brand) Oi Velox (ADSL, 3G formerly Velox) Oi Internet (ISP) 31 (long-distance and international calling) Oi Wi-Fi (Wi-Fi access, at home or via hotspots) Oi TV (DTH pay TV) Oi Voip (Voice over IP) In 2010, Portugal Telecom acquired 22.4% of Oi ...

  3. CPF number - Wikipedia

    en.wikipedia.org/wiki/CPF_number

    The CPF number (Cadastro de Pessoas Físicas, ; Portuguese for "Natural Persons Register") is the Brazilian individual taxpayer registry, since its creation in 1965. [1] This number is attributed by the Brazilian Federal Revenue to Brazilians and resident aliens who, directly or indirectly, pay taxes in Brazil.

  4. Oi (interjection) - Wikipedia

    en.wikipedia.org/wiki/Oi_(interjection)

    Oi / ɔɪ / is an interjection used in various varieties of the English language, particularly Australian English, British English, Indian English, Irish English, New Zealand English, and South African English, as well as non-English languages such as Chinese, Tagalog, Tamil, Hindi/Urdu, Italian, Japanese, and Portuguese to get the attention of another person or to express surprise or disapproval.