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  2. Caving - Wikipedia

    en.wikipedia.org/wiki/Caving

    Caving, also known as spelunking (United States and Canada) and potholing (United Kingdom and Ireland), is the recreational pastime of exploring wild cave systems (as distinguished from show caves). In contrast, speleology is the scientific study of caves and the cave environment.

  3. List of polling organizations - Wikipedia

    en.wikipedia.org/wiki/List_of_polling_organizations

    This is a list of notable polling organizations by country. All the major television networks, alone or in conjunction with the largest newspapers or magazines, in virtually every country with elections, operate their own versions of polling operations, in collaboration or independently through various applications.

  4. Speleology - Wikipedia

    en.wikipedia.org/wiki/Speleology

    Speleology (from Ancient Greek σπήλαιον (spḗlaion) 'cave' and -λογία (-logía) 'study of') is the scientific study of caves and other karst features, as well as their composition, structure, physical properties, history, ecology, and the processes by which they form (speleogenesis) and change over time (speleomorphology).

  5. Pit cave - Wikipedia

    en.wikipedia.org/wiki/Pit_cave

    Stupendous Pit, Rumbling Falls Cave, Tennessee, USA, is a 202 ft (62 m) pit that drops into a 26 acres (110,000 m 2) chamber. Hellhole, West Virginia, USA, has a 154 ft (47 m) entrance drop and was the site of development of the single rope technique in the 1950s and '60s. Natural Trap Cave, located in the Bighorn Mountains of Wyoming, is 85 ft ...

  6. List of largest companies in the United States by revenue

    en.wikipedia.org/wiki/List_of_largest_companies...

    This list comprises the largest companies currently in the United States by revenue as of 2024, according to the Fortune 500 tally of companies and Forbes. The Fortune 500 list of companies includes only publicly traded companies, also including tax inversion companies. There are also corporations having foundation in the United States, such as ...

  7. Holding company - Wikipedia

    en.wikipedia.org/wiki/Holding_company

    Organization. Trade. Business and economics portal. v. t. e. A holding company is a company whose primary business is holding a controlling interest in the securities of other companies. [1] A holding company usually does not produce goods or services itself. Its purpose is to own stock of other companies to form a corporate group.

  8. List of largest companies by revenue - Wikipedia

    en.wikipedia.org/wiki/List_of_largest_companies...

    This list comprises the world's largest companies by consolidated revenue, according to the Fortune Global 500 2024 rankings and other sources. [2] American retail corporation Walmart has been the world's largest company by revenue since 2014. [1] The list is limited to the largest 50 companies, all of which have annual revenues exceeding US ...

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