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).
CHAPTER 40 Scheduling Appointments 961 Clustering or Categorization Clustering involves scheduling patients with similar prob-lems or conditions into groups. Each group is seen on a certain day or within a certain time block during the day. This scheduling method is also called categorization.