Kiosk model
This design is used for developers who use a kiosk model where some
(but not necessarily all) the surfers come in from dedicated machines, perhaps
in airport terminals, supermarkets, or malls.
In the kiosk model the web
browser is located on the same machine as the web server.
This gives the surfer at the kiosk machine the quickest response, and the resources of a dedicated web
application. The web application then goes out over the network as needed, to work with the database
server, which is then shared by hundreds or thousands of kiosks. With the kiosk model, you can dedicate
high-end hardware to the busiest kiosks and use moderate-level equipment for the rest.
Products 
The Hub
Process Controller