- Facebook is a social networking service and website launched in February 2004.
- Facebook has over 900 million active users
- Users must register before using the site, after which they may create a personal profile, add other users as friends, and exchange messages, including automatic notifications when they update their profile.
2. Google
- Google Search (or Google Web Search) is a web search engine owned by Google Inc.
- Google Search is the most-used search engine on the World Wide Web,
- Google Search provides many options for customized search, using Boolean operators such as: exclusion ("-xx"), alternatives ("xx OR y"), and wildcard ("x * x").
- The main purpose of Google Search is to hunt for text in Web pages, as opposed to other data, such as with Google Image Search
3. Zedge


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