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2. Guide number - Wikipedia

   en.wikipedia.org/wiki/Guide_number

   Cameras with focal-plane shutters—even if they had PC connectors with X, F, M, or S-sync delays ("xenon sync" with zero delay and flashbulbs with peak delays of 5, 20, and 30 ms)—could not be used at speeds that attenuated guide numbers with most types of flashbulbs because their light curves were characterized by rapid rise and fall rates; the second shutter curtain would begin wiping ...

3. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   The first LED was created by Soviet inventor Oleg Losev [9] in 1927, but electroluminescence was already known for 20 years, and relied on a diode made of silicon carbide. ...

4. City of London Electric Lighting Company - Wikipedia

   en.wikipedia.org/wiki/City_of_London_Electric...

   In 1889 the Corporation of London invited tenders from electrical plant manufacturers to provide electric lighting throughout the 1.25 square miles of City of London.The Laing, Wharton and Down Construction Syndicate undertook to supply the eastern district of the City and the Anglo-American Brush Electrical Engineering Company to supply the central and western districts. [1]

5. Android (operating system) - Wikipedia

   en.wikipedia.org/wiki/Android_(operating_system)

   It concerns the 2017–2018 period where the issue regarding misleading location tracking settings was discovered, and the case came under Australia’s Competition & Consumer Commission responsibility. The trial concluded in 2021 when the court decided Google broke Consumer law for about 1.3 million of Google account owners. [315]

6. Insurance - Wikipedia

   en.wikipedia.org/wiki/Insurance

   In 2017, within the framework of the joint project of the Bank of Russia and Yandex, a special check mark (a green circle with a tick and 'Реестр ЦБ РФ' (Unified state register of insurance entities) text box) appeared in the search for Yandex system, informing the consumer that the company's financial services are offered on the ...

7. Che Guevara - Wikipedia

   en.wikipedia.org/wiki/Che_Guevara

   Ernesto "Che" Guevara [a] (14 June 1928 [1] – 9 October 1967) was an Argentine Marxist revolutionary, physician, author, guerrilla leader, diplomat, and military theorist.A major figure of the Cuban Revolution, his stylized visage has become a ubiquitous countercultural symbol of rebellion and global insignia in popular culture.