The best known of these sites is Yahoo, but Yahoo is not all inclusive. There are other subject directories. They may include sites that suit your needs better. Go to the list of search engines, subject directories, and database collections. These little bits of information are stored in files that are different than the usual pages that you see on the Web.
Many organizations make their databases available from their websites.
If you only use a search engine to find information, you may be missing a good resource in the form of a database. To make up for this gap, there are web sites devoted to listing databases available on the Internet. Go to the list of search engines, subject directories, and database collections. Just because it is there, doesn't mean it is necessarily accurate. Some are free and some are not.