http://www.googleguide.com/google_works.html

search hint - http://www.google.com/help/refinesearch.html

insights-into-the-world-of-the-google - http://list25.com/25-crazy-insights-into-the-world-of-the-google-empire/

google-maps-101-how-we-map-world - https://www.blog.google/products/maps/google-maps-101-how-we-map-world/