Forms allow users to provide information in a clean and organized way. With forms, users can input numbers, passwords, choose options from drop down menus, enter free text, etc.

Scripts are custom programs used to provide a plethora of functionality. Scripts can be standalone (e.g. counting hits), or can be used to process information provided by the user (e.g. calculating an order total).

When you combine forms, scripting and databases, it is possible to develop complex applications such as online booking systems, online advisors, etc.