What features of Google do you use?

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If you go to Google site, you will notice that there is a menu on top and those are the features of Google. These features are Web, Images, News, Books, Translate, Scholar, Gmail and more.. Which of these features do you use? I'm sure most of us use the Web feature because that is the one we use in searching for a word. I also use the other features such as Images and Translate. I use the Images feature if I need to search for a picture. While I use Translate feature whenever I encounter an unfamiliar word, and it will translate the word for me. I also has an account in Gmail but I seldom check it since YahooMail is my primary email engine. How about you, what Google features do you use?