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  2. History of mobile phones - Wikipedia

    en.wikipedia.org/wiki/History_of_mobile_phones

    A satellite phone is a type of mobile phone that connects to other phones or the telephone network by radio link through satellites orbiting the Earth instead of terrestrial cell sites, as cellphones do. Therefore, they can work in most geographic locations on the Earth's surface, as long as open sky and the line-of-sight between the phone and ...

  3. iPad - Wikipedia

    en.wikipedia.org/wiki/IPad

    The iPad is a brand of iOS - and iPadOS -based tablet computers that are developed by Apple, first introduced on January 27, 2010. The iPad range consists of the original iPad lineup and the flagship products iPad Mini, iPad Air, and iPad Pro . The iPhone's iOS operating system (OS) was initially used for the iPad but in September 2019, its OS ...

  4. Mobile device - Wikipedia

    en.wikipedia.org/wiki/Mobile_device

    Mobile device. A mobile device or handheld computer is a computer small enough to hold and operate in hand. Mobile devices are typically battery-powered and possess a flat-panel display and one or more built-in input devices, such as a touchscreen or keypad. Modern mobile devices often emphasize wireless networking, to both the Internet and to ...

  5. Problematic smartphone use - Wikipedia

    en.wikipedia.org/wiki/Problematic_smartphone_use

    Problematic smartphone use is psychological or behavioral dependence on cell phones. It is closely related to other forms of digital media overuse such as social media addiction or internet addiction disorder . Commonly known as " smartphone addiction ", the term "problematic smartphone use" was proposed by researchers to describe similar ...

  6. List of iPad models - Wikipedia

    en.wikipedia.org/wiki/List_of_iPad_models

    iPad iPad mini iPad Air iPad Pro Highest Supported iPadOS 9.7-inch to 11-inch 12.9-inch M4 LPDDR5 3750 MHz 16 GB PCIe-Based SSD 1 TB, 2 TB iPad Pro 11-inch (5th gen) iPad Pro 13-inch iPadOS 17.6.1: 8 GB 256 GB, 512 GB M2 LPDDR5 3200 MHz 16 GB 1 TB, 2 TB iPad Pro 11-inch (4th gen) iPad Pro 12.9-inch (6th gen) 8 GB 1 TB iPad Air (6th gen)

  7. Cell site - Wikipedia

    en.wikipedia.org/wiki/Cell_site

    A cell site, cell phone tower, cell base tower, or cellular base station is a cellular -enabled mobile device site where antennas and electronic communications equipment are placed (typically on a radio mast, tower, or other raised structure) to create a cell, or adjacent cells, in a cellular network. The raised structure typically supports ...

  8. Mobile phone - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone

    A mobile phone or cell phone[ a] is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area, as opposed to a fixed-location phone ( landline phone ). The radio frequency link establishes a connection to the switching systems of a mobile phone operator, which ...

  9. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    A PDF file is often a combination of vector graphics, text, and bitmap graphics. The basic types of content in a PDF are: Typeset text stored as content streams (i.e., not encoded in plain text ); Vector graphics for illustrations and designs that consist of shapes and lines;