You want to find information about Java. You visit a popular search engine and manually search through a directory tree of topics until you find a directory titled "Computers" and a subdirectory…

You want to find information about Java. You visit a popular search engine and manually search through a directory tree of topics until you find a directory titled "Computers" and a subdirectory titled "Programming Languages." You select the topic "Java" and look through a list of indexed pages on the topic, then choose one page with which to begin your research. Which type of search index did you use?