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  2. Telephone numbers in Brazil - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Brazil

    Despite this fact, mobile phones registered outside the 11–19 , 21, 22, 24 (Rio de Janeiro) and 27–28 (Espírito Santo) areas are usually displayed on WhatsApp (widely used by Brazilians to send text, voice and video messages due to the privileged access granted by mobile operators, in contrast to the assumption of network neutrality ...

  3. Oi (telecommunications) - Wikipedia

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

    Oi Internet is an ISP that was launched in 2004. Oi Internet started services with a promotion that offered 31% off the dial-up connection costs on the subscriber's bill. However, Anatel, the Brazilian telecom regulator, did not allow this practice. Later, the ISP relaunched the promotion, offering 31% of the dial-up connection costs deposited ...

  4. WhatsApp - Wikipedia

    en.wikipedia.org/wiki/WhatsApp

    WhatsApp (officially WhatsApp Messenger) is an instant messaging (IM) and voice-over-IP (VoIP) service owned by technology conglomerate Meta. [13] It allows users to send text, voice messages and video messages, [14] make voice and video calls, and share images, documents, user locations, and other content.

  5. Comparison of VoIP software - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_VoIP_software

    This is a comparison of voice over IP (VoIP) software that examines applications and systems used for conducting voice and multimedia communications across Internet Protocol (IP) networks. VoIP technology has transformed telecommunications by offering alternatives to traditional telephony systems while providing enhanced features and cost savings.

  6. Numero sign - Wikipedia

    en.wikipedia.org/wiki/Numero_sign

    The numero sign or numero symbol, № (also represented as Nº, No̱, №, No., or no.), [1] [2] is a typographic abbreviation of the word number(s) indicating ordinal numeration, especially in names and titles. For example, using the numero sign, the written long-form of the address "Number 29 Acacia Road" is shortened to "№ 29 Acacia Rd ...

  7. Internet Assigned Numbers Authority - Wikipedia

    en.wikipedia.org/wiki/Internet_Assigned_Numbers...

    The Internet Assigned Numbers Authority (IANA) is a standards organization that oversees global IP address allocation, autonomous system number allocation, root zone management in the Domain Name System (DNS), media types, and other Internet Protocol–related symbols and Internet numbers.

  8. No-communication theorem - Wikipedia

    en.wikipedia.org/wiki/No-communication_theorem

    In physics, the no-communication theorem (also referred to as the no-signaling principle) is a no-go theorem in quantum information theory. It asserts that during the measurement of an entangled quantum state , it is impossible for one observer to transmit information to another observer, regardless of their spatial separation.