This is the UML sequence diagram of Patient Management System which shows the interaction between the objects of Doctor, Doctor Schedule, Medicine, Test, Diease. The instance of class objects involved in this UML Sequence Diagram of Patient Management System are as follows:

• Doctor Object
• Doctor Schedule Object
• Medicine Object
• Test Object
• Diease Object

This is the UML sequence diagram of Online Travel Portal System which shows the interaction between the objects of User, Charges, Hotel Booking, Customer, Cabs. The instance of class objects involved in this UML Sequence Diagram of Online Travel Portal System are as follows:

• User Object
• Charges Object
• Hotel Booking Object
• Customer Object
• Cabs Object

This is the UML sequence diagram of News Portal System which shows the interaction between the objects of News, Types, Contents, Latest Posts, Media. The instance of class objects involved in this UML Sequence Diagram of News Portal System are as follows:

• News Object
• Types Object
• Contents Object
• Latest Posts Object
• Media Object

This is the UML sequence diagram of Office Management System which shows the interaction between the objects of Task, Time Entrie, Employee, Office, Resource. The instance of class objects involved in this UML Sequence Diagram of Office Management System are as follows:

• Task Object
• Time Entrie Object
• Employee Object
• Office Object
• Resource Object

This is the UML sequence diagram of Online Gas Booking System which shows the interaction between the objects of Connection, Payment, Gas, Booking, Customer. The instance of class objects involved in this UML Sequence Diagram of Online Gas Booking System are as follows:

• Connection Object
• Payment Object
• Gas Object
• Booking Object
• Customer Object

This is the UML sequence diagram of Online Crime Investigation System which shows the interaction between the objects of FIR, Department, Crime, Criminal, Investigation. The instance of class objects involved in this UML Sequence Diagram of Online Crime Investigation System are as follows:

• FIR Object
• Department Object
• Crime Object
• Criminal Object
• Investigation Object

This is the UML sequence diagram of Online Music Portal System which shows the interaction between the objects of Album, Music Library, Album Type, Singer, Performaer. The instance of class objects involved in this UML Sequence Diagram of Online Music Portal System are as follows:

• Album Object
• Music Library Object
• Album Type Object
• Singer Object
• Performaer Object

This is the UML sequence diagram of Order Processing System which shows the interaction between the objects of Company, Receipt, Payment Customer, Order, Bill. The instance of class objects involved in this UML Sequence Diagram of Order Processing System are as follows:

• Company Object
• Receipt Object
• Payment Customer Object
• Order Object
• Bill Object

This is the UML sequence diagram of Patient Care System which shows the interaction between the objects of Appoitments, Doctors, Test, Medicine, Patient. The instance of class objects involved in this UML Sequence Diagram of Patient Care System are as follows:

• Appoitments Object
• Doctors Object
• Test Object
• Medicine Object
• Patient Object

This is the UML sequence diagram of Parking System which shows the interaction between the objects of Type, Parking Slot, Customers, Duration, Parking Fee. The instance of class objects involved in this UML Sequence Diagram of Parking System are as follows:

• Type Object
• Parking Slot Object
• Customers Object
• Duration Object
• Parking Fee Object