Abstract: An apparatus for identifying an access terminal includes an application installation determination unit configured to generate information indicating whether or not each application on an application list is installed in the access terminal by determining whether or not each application on the application list is installed in the access terminal; and an access terminal identification code generating unit configured to generate an access terminal identification code of the access terminal by combining the information indicating whether or not each application is installed in the access terminal; and an access terminal identification unit configured to identify the access terminal by using the access terminal identification code.

Abstract: An online chatting method for a user connected to a website includes (a) receiving information on a TCP socket server by a user client when the user client accesses a web page offered by a web server, (b) accessing the TCP socket server by the user client by using the information on the TCP socket server, (c) if the user client is allowed to access the TCP socket server, transmitting and receiving chatting messages to/from an operator client through the TCP socket server and (d) if the user client fails to access the TCP socket server, storing the chatting messages to be transmitted to the operator client through in a database and periodically receiving the chatting messages stored in the database by the operator client.

Abstract: A method for generating access statistic data on each visitor to a web site includes (a)when a visitor terminal accesses the web site, reading unique ID from userdata file of xml in which data can be stored and retrieved by using userData Behavior; (b) when access history of the visitor terminal having unique ID in step (a) is stored in an access statistics DB, updating the access history of the visitor terminal in the DB with unique ID; and (c)when unique ID is not readout in step (a) or the access history of the visitor terminal having unique ID in step (a) is not stored in the DB, generating unique ID corresponding to the visitor terminal, generating userdata file where unique ID is written and storing userdata file in the visitor terminal, and storing the access history of the visitor terminal in the DB with unique ID.