YAHOO doesn't need any introduction. It's
absolutely the most efficient research engine website that nowadays
internet can offer.
Every research is easy, and with YAHOO it's really possible to avoid to waste time with finding useless sites and links to things not concerning the object of the research.
The amount of results that we can approach with every research is impressive: thousands and millions of pages, and YAHOO also notifies the quality of the sites: you'll know in advance if the contents of the site is safe from virus or contains something of dangerous.
Stop using Altavista or Google (personally I don't like very much these ones, but maybe somebody has different opinions). Here, at the top of your research, you get the most clicked sites, so the websites who have gained the best ranking positions. It means that the less important sites get almost excluded by your research. Of course, if you know before what you are exactly looking for, you can shaper better your looking: you can so refine your research, adding more words in the blank space. If you type "simpson", you'll find tonnes of websites dedicated to Simpson cartoon. If you know for a person, who's named Martha Simpson, you should so type the whole name in order to exclude the Simpson cartoons devoted websites. This is a rather stupid example, but it makes it clear.
No other research site can provide so many results as much as Yahoo does. Recommended!!