Which of the following organizes the web into categories?

A web directory organises sites into subject categories, usually curated by people.

A search engine automatically indexes pages by keyword rather than sorting them into set categories.

An encyclopaedia is a reference of articles, not a categorised listing of websites.

An archive stores past copies of content, such as old web pages, not a category tree of the live web.

Directories let users browse topic by topic instead of typing a query.

Yahoo began as a famous hand-built web directory.