yahoo

search.yahoo.com
search.yahoo.com/web/advanced
yahoo is one of popular websites on internet which also provided a search engine. Similar as google.com it also provide image search engine.

images.search.yahoo.com
images.search.yahoo.com/images/advanced
This is yahoo image search to search any images that match the keyword. It also have advance search on it.

video.search.yahoo.com
video.search.yahoo.com/video/advanced
Yahoo's video search and it advance search.

sem.smallbusiness.yahoo.com/searchenginemarketing/internetmarketing.php
This site is for buying Sponsored Search, which is an ad for your website on yahoo search engine.

search.yahoo.com/info/submit.html
Those sites on search engine are not automatically added, you might want to Submit your site on yahoo search engine with on this site.

- Screenshot image taken from alexa.com