Common Lisp: Inside Sabre

bugbear writes "I just got permission from the author (Carl de Marcken of ITA Software) to publish this email, which describes the inner workings of Sabre, the flight search software that the airlines and travel agencies use. It is a case study in cheap Linux/Intel, NT/Intel and Hpux boxes replacing mainframes, and also the use of lisp and other languages in a server-based app. Update: 01/16 13:45 GMT by H :RawDigits writes "Common Lisp: Inside Sabre - correction. The Lisp engine is used by Orbitz, and not Sabre. Sabre still maintains mainframe systems for their booking. I should know, I am sitting in the Orbitz NOC right now ;)"