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  2. Pager - Wikipedia

    en.wikipedia.org/wiki/Pager

    A pager (also known as a beeper, bleeper or pocket bell) is a wireless telecommunications device that receives and displays alphanumeric or voice messages. One-way pagers can only receive messages, while response pagers and two-way pagers can also acknowledge, reply to and originate messages using an internal transmitter.

  3. Danger Hiptop - Wikipedia

    en.wikipedia.org/wiki/Danger_Hiptop

    The Danger Hiptop, also re-branded as the T-Mobile Sidekick, Mobiflip and Sharp Jump is a GPRS/EDGE/UMTS smartphone that was produced by Danger, Inc. from 2002 to 2010.. The Hiptop software was designed by Danger, Inc., which was located in Palo Alto, California and purchased by Microsoft for $500 million in 2008.

  4. Iridium satellite constellation - Wikipedia

    en.wikipedia.org/wiki/Iridium_satellite...

    Overview. The Iridium system was designed to be accessed by small handheld phones, the size of a cell phone. While "the weight of a typical cell phone in the early 1990s was 10.5 ounces" Advertising Age wrote in mid 1999 that "when its phone debuted, weighing 1 pound and costing $3,000, it was viewed as both unwieldly and expensive."

  5. Selective calling - Wikipedia

    en.wikipedia.org/wiki/Selective_calling

    A widely varied set of tone plans or schemes are used for these systems. Some tone plans use tone frequencies which are close or overlap with tones used by other coding plans. For example, one plan might use very narrow filters and specify a tone of 702.3 Hz. Another may use a simple filter of capacitors and inductors and specify a tone of 700 Hz.

  6. SMS - Wikipedia

    en.wikipedia.org/wiki/SMS

    SMS (Short Message Service) is a text messaging service component of most telephone, Internet, and mobile device systems. It uses standardized communication protocols that let mobile devices exchange short text messages. An intermediary service can facilitate a text-to-voice conversion to be sent to landlines.

  7. BlackBerry Limited - Wikipedia

    en.wikipedia.org/wiki/BlackBerry_Limited

    BlackBerry Limited is a Canadian cybersecurity company specializing in enterprise critical event management solutions [clarification needed], endpoint protection [clarification needed], and securing the Internet of things by using artificial intelligence and machine learning against cyberthreats.

  8. SK Telecom - Wikipedia

    en.wikipedia.org/wiki/SK_Telecom

    The company's online brands include Nate, a web portal, June, a mobile multimedia service, Moneta, an e-banking mobile app, Nate Drive, a telematics service, and Digital Home, an online interface to remote-control household appliances. In 2004, SK Telecom launched Hanbyul, the world's first DMB satellite.