Special Report: The Book of Tens 2010
adage.com/article/special-report-the-book-of-tens-2010/advertising-marketer-apps-smartphones/147615
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
The Facebook tab on Delta's fan page lets users search, book and share flights within the social network. Built by Alvenda, the app is a first for the airline industry -- the transaction is completed within the social network, while an earlier tool for European budget airline Easy Jet started the process on Facebook but jumped to its own website to complete the sale.