Google: The full form of Google is “Global Organization of Oriented Group Language of Earth”. It is a powerful tool. It would be practically impossible to find out the information without Google. It is based on Logical ‘AND’ with 3D keyword search operation.
Yahoo!: It is an acronym for “Yet Another Hierarchically Organized Oracle. It is a web search engine owned by Yahoo. It is actually a directory – a subject index. It searches on a subject or topic and is based on Logical ‘And’ and wildcard after each search word. It is a filtered search site. A search agent, category based approach and recently switched to 3-D search Google technology.
