<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> <title></title> </head> <body bgcolor="#ffffff" text="#000000"> Gregory Cooper wrote at 03/09/2010 03:57 PM: <blockquote cite="mid:65e1d50c1003091257n2f217bc4p176627a27384dc6b@mail.gmail.com" type="cite">In case it hasn't been mentioned already, ITA Software's (<a moz-do-not-send="true" href="http://www.itasoftware.com">www.itasoftware.com</a>) popular airfare search engine is written in Common Lisp, as is the core of their airline reservation system.<br> </blockquote> <br> ITA's ARS has an OK story...  An airline reservation system that integrates with the legacy network of mainframes is much more complicated than one might imagine.  I believe an official there was quoted publicly as saying something like (paraphrased from memory) that they used Lisp because the undertaking would have not been doable any other way.  I think that their use of Lisp also helped them to attract some of the smartest software developers.<br> <br> </body> </html>