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  2. Internet - Wikipedia

    en.wikipedia.org/wiki/Internet

    However, by 2018, Asia alone accounted for 51% of all Internet users, with 2.2 billion out of the 4.3 billion Internet users in the world. China's Internet users surpassed a major milestone in 2018, when the country's Internet regulatory authority, China Internet Network Information Centre, announced that China had 802 million users. [ 102 ]

  3. Spreadsheet - Wikipedia

    en.wikipedia.org/wiki/Spreadsheet

    Microsoft released the first version of Excel for the Apple Macintosh on September 30, 1985, and then ported [37] it to Windows, with the first version being numbered 2.05 (to synchronize with the Macintosh version 2.2) and released in November 1987. Microsoft's Windows 3.x platforms of the early 1990s made it possible for their Excel ...

  4. Waste management - Wikipedia

    en.wikipedia.org/wiki/Waste_management

    The Transboundary E-waste Flows Monitor quantified that 5.1 Mt (just below 10 percent of the total amount of global e-waste, 53.6 Mt) crossed country borders in 2019. To better understand the implication of transboundary movement, this study categorizes the transboundary movement of e-waste into controlled and uncontrolled movements and also ...

  5. Sensor - Wikipedia

    en.wikipedia.org/wiki/Sensor

    Different types of light sensors. A sensor is a device that produces an output signal for the purpose of detecting a physical phenomenon.. In the broadest definition, a sensor is a device, module, machine, or subsystem that detects events or changes in its environment and sends the information to other electronics, frequently a computer processor.