1. Directory index query. According to the classified root directory of home page information resources, click the next classified directory in turn, and you can see some further refined categories. Second, keyword query. According to the keyword of the query content, you can enter it, and if necessary, you can also use Boolean logic expression AND/OR/NOT to search. Third, through newsgroup survey. The specific steps are as follows: 1. Determine the target market to be investigated. 2. Determine the discussion groups to join the survey in the target market. 3. Find the target market in the topic directory of the newsgroup discussion group. 4. Find the target market in the topic content of the newsgroup discussion group. 5. Log in to the corresponding newsgroup discussion group. 6. Log in to the filtering system and find useful information in the newsgroup. 7. Ask the participants in the newsgroup discussion group about other related topics. 8. Send a short questionnaire to the relevant discussion group. 9. Consult discussion group articles, analyze questionnaire answers, and form online survey results.