Toad Data Modeler is a tool that was developed by Charonware and was later on acquired by Quest Software Inc. which allows its users to create, document as well as maintain database systems and all of these things are being done virtually. It has the capability of giving permissions to its users in drawing universal, physical and logical ERD more commonly known as Entity Relationship Diagrams. Toad Data Modeler provisions several items that are deemed to be database-specific making it essential that the user selects a database system that will be used for the physical ERD. The reports being generated using the Toad Data Modeler can use PDF, HTML or RTF formats for its output. The tool uses Model Merge as well as Alter Script Generation in order to synchronize the models with the existing physical databases. It has a built-in Gallery which can be used for sharing as well as customization features which is often used for forms.