Google is a multinational corporation that specializes in Internet-related services and products. The company’s product portfolio includes Google Search, which provides users with access to information online; Knowledge Graph that allows users to search for things, people, or places as well as builds systems recognizing speech and understanding natural language; Google Now, which provides information to users when they need it; Product Listing Ads that offer product image, price, and merchant information; AdWords, an auction-based advertising program; AdSense, which enables websites that are part of the Google Network to deliver ads; Google Display, a display advertising network; DoubleClick Ad Exchange, a marketplace for the trading display ad space; and YouTube that offers video, interactive, and other ad formats. Additionally, the company offers Android, an open-source mobile software platform; hardware products, including Chromebook, Chrome, Chromecast, and Nexus devices; Google+ , a social platform for sharing content with others; Google Play, a cloud-based digital entertainment store for apps, music, books, and movies; Google Drive, a place for users to create, share, collaborate, and keep their stuff; and Google Wallet, a virtual wallet for in-store contactless payments. Further, it provides Google Apps, which include Gmail, Calendar, and Google Sites that are built for people to work anywhere, anytime, on any device without loss of security or control; Google Maps Application Programming Interface; Google Earth Enterprise, a software solution for imagery and data visualization; Google App Engine, a Platform-as-a-service; Google Cloud Storage; Google BigQuery for real-time analytics; Google Cloud SQL for structured query language; and Google Compute Engine, an Infrastructure-as-a-service-Platform. It also offers mobile wireless devices, and related products and services. Google was founded by Larry Page and Sergey Brin in 1996 while they were Ph.D. students at Stanford University.