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  2. Vertical service code - Wikipedia

    en.wikipedia.org/wiki/Vertical_service_code

    A vertical service code ( VSC) is a sequence of digits and the signals star (*) and pound/hash (#) dialed on a telephone keypad or rotary dial to access certain telephone service features. [1] Some vertical service codes require dialing of a telephone number after the code sequence. On a touch tone telephone, the codes are usually initiated ...

  3. Line code - Wikipedia

    en.wikipedia.org/wiki/Line_code

    Polarity-insensitive line codes compensate in these channels. There are three ways of providing unambiguous reception of 0 and 1 bits over such channels: Pair each code word with the polarity-inverse of that code word. The receiver is designed so that either code word of the pair decodes to the same data bits.

  4. Marconi Wireless Telegraph Company of America - Wikipedia

    en.wikipedia.org/wiki/Marconi_Wireless_Telegraph...

    The Marconi Wireless Telegraph Company of America (commonly called American Marconi) was incorporated in 1899. It was established as a subsidiary of the British Marconi Company and held the U.S. and Cuban rights to Guglielmo Marconi 's radio (then called "wireless telegraphy") patents. American Marconi initially primarily operated high-powered ...

  5. McAfee AOL Premium Subscription FAQs - AOL Help

    help.aol.com/articles/mcafee-aol-premium...

    McAfee is designed to protect your computer from viruses, spyware, hackers and identity thieves through award-winning technology that automatically runs scans and updates so you have the most up-to-date protection. McAfee Internet Security uses: AOL members on the Dial-Up Advantage and High-Speed Essentials plans can download McAfee Internet ...

  6. Turbo code - Wikipedia

    en.wikipedia.org/wiki/Turbo_code

    Turbo codes are used in 3G / 4G mobile communications (e.g., in UMTS and LTE) and in ( deep space) satellite communications as well as other applications where designers seek to achieve reliable information transfer over bandwidth- or latency-constrained communication links in the presence of data-corrupting noise.

  7. Amphetamine - Wikipedia

    en.wikipedia.org/wiki/Amphetamine

    Amphetamine [note 2] (contracted from a lpha - m ethyl ph en et hyl amine) is a central nervous system (CNS) stimulant that is used in the treatment of attention deficit hyperactivity disorder (ADHD), narcolepsy, and obesity. Amphetamine was discovered as a chemical in 1887 by Lazăr Edeleanu, and then as a drug in the late 1920s. [25]

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