As we know, the CGI works as a standard way of passing of data for the use of the web user on her request. That means on a request of web user application of program is done to receive data and in turn it is sent for the user. This is the most common use of the CGI program. If you are a novice in this field, you may ask, is there any other use of CGI program? Of course there are other uses of this CGI program. Now we will discuss about the different uses of this program.

Let us start with Guest-books. For accepting data under this CGI, there is CGI routine. The common gateway interface routine not only accepts data; it also ensures the validity of the data, acknowledges email, sends email to the web master and creates the entry of guest book. The second most important use of the CGI program is email forms. The common gateway interface formats the data or information as an e-mail and passes it to the webmaster. There may be more complex routines of CGI to maintain the data base. It also passes acknowledgement notices. The third important use of the CGI program is to maintain mailing list. This is also an important routine of the CGI. Such routine permits the visitors to get subscribed in a mailing list and a visitor can also be unsubscribed from a list if she fells to do so. To perform this function the CGI routine has to maintain the database of mailing addresses. The finer ones, in different situations send acknowledgement notices to the web master and to the visitors.

A potent enquiry may peep in your mind, what is this CGI routine? The CGI routine understands better the common gateway interface standard. Perl, the most popular language of CGI is very easy to follow and use. It is a scripting language. There are also other languages like C ++, which works faster.