How Travel Meta-search sites is built?

[The Giant]

Take a look at Kayak.com HotelsCombined.com Cheapoair.com,Trivago.com aggragate live rates and availability of rooms and flights from multiple booking sites. They don't have booking engines, so customer cannot book with them rather than third party.
My question is how is built? Which technology used?
Thanks!

 

[zech]

Actually the other day i was online researching about the same issue you are facing and ended up on this link on stack overflow api - How does a site like kayak.com aggregate content? - Stack Overflow, i hope that helps

 

[The Giant]

Yeah, Don't we have Tanzanians who can execute projects like this 1?