Web sites are found by their addresses on the World Wide Web. These addresses are known as URLs, or Uniform Resource Locators. Every website has a URL assigned to it, so both searchers and Web servers can find them quickly and easily.
Cluster analysis or clustering is the task of grouping a set of objects in such a way that objects in the same group (called a cluster) are more similar (in some sense or another) to each other than to those in other groups (clusters).
verb (used without object), nestled, nestling. 1. to lie close and snug, like a bird in a nest; snuggle or cuddle. 2. to lie or be located in a sheltered spot; be naturally or pleasantly situated: a cottage nestling in a pine grove. 3. Archaic.