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HCA Healthcare, Inc.[5] (historically known as Hospital Corporation of America) is an American global for-profit operator of health care facilities that was founded in 1968. It is based in Nashville, Tennessee, and, as of May 2020, owned and operated 186 hospitals and approximately 2,400 sites of care, including surgery centers, freestanding emergency rooms, urgent care centers and physician ...
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A screenshot of the English Wikipedia login screen in mobile mode In computer security, logging in (or logging on, signing in, or signing on) is the process by which an individual gains access to a computer system or program by identifying and authenticating themselves. Typically, user credentials consist of a username and a password. [1] These credentials themselves are sometimes referred to ...
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In data mining and statistics, hierarchical clustering[1] (also called hierarchical cluster analysis or HCA) is a method of cluster analysis that seeks to build a hierarchy of clusters.