This is the UML sequence diagram of Hotel Room Management System which shows the interaction between the objects of Payment, Hotel Employee, Hotel, Customer, Facility. The instance of class objects involved in this UML Sequence Diagram of Hotel Room Management System are as follows:

• Payment Object
• Hotel Employee Object
• Hotel Object
• Customer Object
• Facility Object

This is the UML sequence diagram of Hotel Management System which shows the interaction between the objects of Payments, Rooms, Booking, Services, Hotel. The instance of class objects involved in this UML Sequence Diagram of Hotel Management System are as follows:

• Payments Object
• Rooms Object
• Booking Object
• Services Object
• Hotel Object

This is the UML sequence diagram of Hotel Booking System which shows the interaction between the objects of Hotel, Services, Booking, Rooms, Customers. The instance of class objects involved in this UML Sequence Diagram of Hotel Booking System are as follows:

• Hotel Object
• Services Object
• Booking Object
• Rooms Object
• Customers Object

This is the UML sequence diagram of Hostel Management System which shows the interaction between the objects of Rooms, Allotees, Hostel, Rent, Payments. The instance of class objects involved in this UML Sequence Diagram of Hostel Management System are as follows:

• Rooms Object
• Allotees Object
• Hostel Object
• Rent Object
• Payments Object

This is the UML sequence diagram of Error Tracking System which shows the interaction between the objects of Tester, Project, Tracking, Timeslot, Error. The instance of class objects involved in this UML Sequence Diagram of Error Tracking System are as follows:

• Tester Object
• Project Object
• Tracking Object
• Timeslot Object
• Error Object

This is the UML sequence diagram of Exam Seating Management System which shows the interaction between the objects of , Teacher, Block, Room, Exam. The instance of class objects involved in this UML Sequence Diagram of Exam Seating Management System are as follows:

• Object
• Teacher Object
• Block Object
• Room Object
• Exam Object

This is the UML sequence diagram of Event Tracker System which shows the interaction between the objects of Tracking, Event, Images, Venue, Video. The instance of class objects involved in this UML Sequence Diagram of Event Tracker System are as follows:

• Tracking Object
• Event Object
• Images Object
• Venue Object
• Video Object

This is the UML sequence diagram of Examination Management System which shows the interaction between the objects of Courses, Papers, Students, Marks, Exam. The instance of class objects involved in this UML Sequence Diagram of Examination Management System are as follows:

• Courses Object
• Papers Object
• Students Object
• Marks Object
• Exam Object

This is the UML sequence diagram of Enrollment System which shows the interaction between the objects of Course, Enrollment, Fees, Login, Student. The instance of class objects involved in this UML Sequence Diagram of Enrollment System are as follows:

• Course Object
• Enrollment Object
• Fees Object
• Login Object
• Student Object

This is the UML sequence diagram of Employee Management System which shows the interaction between the objects of Employee, Experience, Salary, , Leaves. The instance of class objects involved in this UML Sequence Diagram of Employee Management System are as follows:

• Employee Object
• Experience Object
• Salary Object
• Object
• Leaves Object