Yahoo! Search ("Build your Own Search Engine"). This service opens the doors for developers to use Yahoo!'s system for indexing information and images and create their own custom search engine. In January 2010, Microsoft announced a deal in which it would take over the functional operation of Yahoo! Search, and set up a joint venture to sell advertising on both Yahoo! Search and Bing known as the Microsoft Search Alliance. A complete transition of all Yahoo! sponsored ad clients to Microsoft adCenter (now Bing Ads) occurred in October 2010. On March 12, 2014, Yahoo announced a partnership with Yelp to integrate its
Microsoft Entourage Spotlight search engine and AppleScript; however, the use of a monolithic database made it difficult to back up incrementally with Time Machine. Entourage also maintained a separate address book, but allowed synchronization of contacts and calendar events through Sync Services. Unlike the other applications in the Mac version of the Microsoft Office suite, Entourage did not share a name with its Microsoft Windows counterpart. Microsoft claimed that Entourage was intended "to address an entirely different audience". Entourage had its origins in Outlook Express 5 on the Mac, as well as Claris Emailer and contained "no ported code, and no Office