A web search engine is a software system that is designed to search for information on the World Wide Web. The search results are generally presented in a line of results often referred to as search engine results pages (SERPs). The information may be a specialist in web pages, images, information and other types of files. Some search engines also mine data available in databases or open directories. Unlike web directories, which are maintained only by human editors, search engines also maintain real-time information by running an algorithm on a web crawler.
Human-based computation (HBC) is a computer science technique in which a machine performs its function by outsourcing certain steps to humans. This approach uses differences in abilities and alternative costs between humans and computer agents to achieve symbiotic human-computer interaction.
In traditional computation, a human employs a computer to solve a problem; a human provides a formalized problem description and an algorithm to a computer, and receives a solution to interpret. Human-based computation frequently reverses the roles; the computer asks a person or a large group of people to solve a problem, then collects, interprets, and integrates their solutions.
Social search or a social search engine is a type of web search that takes into account the Social Graph of the person initiating the search query. When applied to web search this Social-Graph approach to relevance is in contrast to established algorithmic or machine-based approaches where relevance is determined by analyzing the text of each document or the link structure of the documents. Search results produced by social search engine give more visibility to content created or "touched" by users in the Social Graph.
Social search takes many forms, ranging from simple shared bookmarks or tagging of content with descriptive labels to more sophisticated approaches that combine human intelligence with computer algorithms.
"Run the World" is a song recorded by American entertainer Jennifer Lopez for her seventh studio album Love? (2011). Written and produced by Terius "The-Dream" Nash and C. "Tricky" Stewart, "Run the World" was one of several songs recorded with the duo following Lopez's move from Epic Records to Island Records. The track originally featured vocals from The-Dream and a rap verse from American rapper Rick Ross however, the rap verse was removed during mastering process and The-Dream was credited with background vocals instead.
According to Lopez, "Run the World" is about a "type of love when you come together you make each other better;" noting that she shared that love with her husband Marc Anthony. Relating the song to Anthony, Lopez said she believes that they have made each other better artists and people. "Run the World" is a midtempo pop song that critics compared to Lopez's 2002 single "Jenny from the Block". The song received generally mixed reviews from music critics, who despite criticizing the mid-tempo production and reliance on auto-tune thought it to be single-worthy.
A toll-free, Freecall, Freephone, 800, 0800 or 1-800 number is a special telephone number which is free for the calling party, and instead the telephone carrier charges the called party for the cost of the call. A toll-free number is identified by a service access code, from a dialing prefix range similar to a geographic area code, such as "800". The specific service access numbers can vary by country.
The capabilities of toll-free services have evolved as telephone networks have moved from electro-mechanical call switching to fully computerized stored program controlled networks.