Answer:
1. Y A H O O - Y a h o o! is an Internet portal that incorporates a search engine and a directory of World Wide Web sites organized in a hierarchy of topic categories. ... According to the site's official FAQ (frequently asked questions) list, it stands for "Yet Another Hierarchical Officious Oracle."
2. B I N G- Bing is a search engine created and operated by Microsoft, replacing its former Live Search, Windows Live Search, and MSN Search offerings.
3. F A C E B O O K - is defined as an online social networking website where people can create profiles, share information such as photos and quotes about themselves, and respond or link to the information posted by others.
4. FIREFOX- Mozilla Firefox is a free open-source browser whose development is overseen by the Mozilla Corporation.
5. G O 0 G L E - is a structured web page creation tool included as part of the free, web-based Googl_ Docs Editors.
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