use listing/browsing as a simplified and restricted (yet more structured) way for indexing/searching web sites |
hierarchical lists of URLs by topics - thousands of increasingly refined topic-specific areas |
search by browsing the predefined links, while keyword-based title-search is available on the local web site |
information gathering by manual categorization or user submissions (not clear how Yahoo discovers all the listed web sites) |
Yahoo is a web site, not a search service |