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  2. iPad (1st generation) - Wikipedia

    en.wikipedia.org/wiki/IPad_(1st_generation)

    The only major change to the device between its announcement and being available to pre-order was the change of the behavior of the side switch from sound muting to that of a screen rotation lock. [23] The Wi-Fi version of the iPad went on sale in the United States on April 3, 2010. [22] [24] The Wi-Fi + 3G version was released on April 30.

  3. Geographic coordinate system - Wikipedia

    en.wikipedia.org/wiki/Geographic_coordinate_system

    A geographic coordinate system (GCS) is a spherical or geodetic coordinate system for measuring and communicating positions directly on Earth as latitude and longitude. [1] It is the simplest, oldest and most widely used type of the various spatial reference systems that are in use, and forms the basis for most others.

  4. iPad - Wikipedia

    en.wikipedia.org/wiki/IPad

    iPad Front face of the last generation's flagship model, the iPad Pro (5th generation) Developer Apple Manufacturer Foxconn (on contract) Pegatron Type Tablet computer Release date April 3, 2010 ; 14 years ago (April 3, 2010) (1st generation) Units sold 677.7 million (as of 2022) Operating system iOS (2010–2019) iPadOS (2019–present) Connectivity WiFi, cellular, 30-pin dock connector ...

  5. A Not-So-Scientific Way of Counting iPad Sales on Day One - AOL

    www.aol.com/2010/04/05/did-apple-really-sell-700...

    Gene Munster, a well-known consumer electronics and PC analyst at Piper Jaffray, is a notorious optimist about Apple's (AAPL) prospects, quarter in and quarter out. Before the iPad was released to ...

  6. Coordinate system - Wikipedia

    en.wikipedia.org/wiki/Coordinate_system

    The Earth as a whole is one of the most common geometric spaces requiring the precise measurement of location, and thus coordinate systems. Starting with the Greeks of the Hellenistic period, a variety of coordinate systems have been developed based on the types above, including:

  7. Earth-centered, Earth-fixed coordinate system - Wikipedia

    en.wikipedia.org/wiki/Earth-centered,_Earth...

    The Earth-centered, Earth-fixed coordinate system (acronym ECEF), also known as the geocentric coordinate system, is a cartesian spatial reference system that represents locations in the vicinity of the Earth (including its surface, interior, atmosphere, and surrounding outer space) as X, Y, and Z measurements from its center of mass.

  8. Earth radius - Wikipedia

    en.wikipedia.org/wiki/Earth_radius

    Earth radius (denoted as R 🜨 or R E) is the distance from the center of Earth to a point on or near its surface. Approximating the figure of Earth by an Earth spheroid (an oblate ellipsoid), the radius ranges from a maximum (equatorial radius, denoted a) of nearly 6,378 km (3,963 mi) to a minimum (polar radius, denoted b) of nearly 6,357 km (3,950 mi).

  9. Trump thinks former Rep. Liz Cheney could face serious consequences after a House panel called for her to be investigated by the FBI for possible witness tampering during her handling of the ...