BOOCH : The Booch method is named for its inventor,Grady Booch,the Chief Scientist at Rational Software Corporation. He has written several books discussing the needs and benefits of visual modeling and has developed a notation of graphical sysmbols to represent various aspects of a model.

Object Management Tecnology : The OMT notation comes from Dr.James Rumbaugh , who has written several books about systems analysis and design.The OMT notation he purposes has a strong following ,with industry-standard software modeling tools such as Rational Rose and Select OMT supporting it.

Unified Modeling Language UML:The Unified Modeling Language (UML) notation comes from a collaborative effort of Grady Booch,Dr.James Rambaugh , Ivar Jacobson,Rebecca Wirfs-Brocks,Perter Yourdon, and many others.

UML allows people to develop several different types of visual diagrams that represent various aspects of the system. Rational rose supports the development of the majority of these models, as follows.

Use Case diagram :Use Case diagram show the interaction between use cases, which represent system functionality, and actions, which represent the people or systems that provide or receive information from the system

Sequence Diagrams: Sequence diagrams are used to show the flow of functionality through a use case. For example, the Withdraw Money use case has several possible sequences, such as withdraw $, attempting to withdraw without available funds, attempting withdraw with the wrong PIN, and several others.

Collaboration Diagram : Collaboration diagrams show exactly the same information as the Sequence Diagrams. However, Collaboration Diagrams show this information in a different way and with a different purposed.

Class Diagram : Class diagram show the interactios between classes in the system. Classes can be seen as the blue print for objects .Classes contain informtion and behavior that acts on that information.

State Transition Diagrams: State Transition diagrams provide a way to model the various states in which an object can exist.While the class diagram show a static picture of the classes and their relationships.State Transition diagrams are used to model the more dynamic behavior of a system.

Component Diagram : Component diagram show you a physical view of your model .A component diagram shows you the software components in your system and the relationships between them. There are two types of components on the diagram : executable components and code libraries.

Deployment Diagrams : Deployment diagrams are the last type of diagrams we will discuss .The deployment diagram show the physical layout of the network and where the various components will resides.