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2. List of most-subscribed YouTube channels - Wikipedia

   en.wikipedia.org/wiki/List_of_most-subscribed...

   American YouTube personality MrBeast is the most-subscribed channel on YouTube, with 352 million subscribers as of January 2025.. A subscriber to a channel on the American video-sharing platform YouTube is a user who has chosen to receive the channel's content by clicking on that channel's "Subscribe" button, and each user's subscription feed consists of videos published by channels to which ...

3. Category:YouTube critics and reviewers - Wikipedia

   en.wikipedia.org/wiki/Category:YouTube_critics...

   This category is for YouTubers who publish video reviews about films, music, video games, etc. Pages in category "YouTube critics and reviewers" The following 50 pages are in this category, out of 50 total.

4. List of YouTubers - Wikipedia

   en.wikipedia.org/wiki/List_of_YouTubers

   They are best known for producing online video content for their eponymous YouTube channel. Marsh Family: United Kingdom MarshFamilySongs English family musical group Anthony Fantano: United States theneedledrop, fantano Reviews music through his channel The Needle Drop, which is also a Connecticut Public Radio podcast. FHProductionHK: Hong Kong

5. List of most-viewed YouTube channels - Wikipedia

   en.wikipedia.org/wiki/List_of_most-viewed...

   This is an accepted version of this page This is the latest accepted revision, reviewed on 27 January 2025. This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by adding missing items with reliable sources. Indian record label T-Series is the most-viewed YouTube channel, with over 282 billion views. The list of most-viewed YouTube ...

6. Pulse oximetry - Wikipedia

   en.wikipedia.org/wiki/Pulse_oximetry

   A pulse oximeter probe applied to a person's finger. A pulse oximeter is a medical device that indirectly monitors the oxygen saturation of a patient's blood (as opposed to measuring oxygen saturation directly through a blood sample) and changes in blood volume in the skin, producing a photoplethysmogram that may be further processed into other measurements. [4]

7. Biox - Wikipedia

   en.wikipedia.org/wiki/Biox

   He led the team of pulse oximeter engineers which later developed the Ohmeda Biox 3700 [3] which was widely used in the anesthesia market in the mid-1980s. The first commercially available oximeters were produced by Hewlett-Packard, and were large, cumbersome, and expensive. These devices were of limited value because they were largely focused ...