ocr: Client's computer Network Server computer Web browser Webserver CGIa application software software Place request Receive request (order a pepperoni) Write data received from client to input file CGI Application Launch Starts and reads CGla application input file Wait for reply process data Wait for end of Write data to output file and shut down CGI-application (order accepted) - - Client receives Read output file and mesage Pass information to (order accepted) client(order accepted)