Definitions. Web Server: This is a computer that runs a program that issues HTTP responses in the form of HTML or XHTML webpages or images in response to a client's requests. MySQL Database: CGI:This stands for Common Gateway Interface. PHP: This is a scripting language that is used on the server. It is used to create dynamic web pages. Domain Name Server: This is a server that is used to locate the IP Address of a domain name. Its abvbreviation is DNS. Bandwidth: This is the amount of data that can be transfered at any one time. Forum: