The SharePoint platform comprises farms, servers, site collections, sites, web parts, and pages.
A farm is a logical group of servers that have the SharePoint products installed and are configured to work together. A site is a website that contains various SharePoint objects, such as pages, document libraries, or calendars. A site collection is a group of sites, normally organized by department, project, cross-functional group, or other business units. A page is an HTML web page. Pages can be basic, just displaying text, or built from templates (such as a wiki or a publishing portal) that may have different web parts preloaded.
Web parts are codeless widgets or apps that can be used to display or interact with information on a page. In the following diagram, Managers (Site) contains three web parts: a calendar, a task list, and a document library:
The Document Library web part looks like a filesystem interface to SharePoint and can be used to...