For example, individuals typically use the Web to find specific answers—also known as focused search—and to uncover patterns and trends about a topic—also known as scanning.
Google (www.google.com) is the most popular Web-searching tool and is most suited to focused searching and discovering deep knowledge.
Tools such as Kartoo (www.kartoo.com) and Clusty (www.clusty.com),
which provide knowledge maps and clustered categories, are more suitable for scan- ning and discovering broad knowledge.