Decision Support System Class Diagram describes the structure of a Decision Support System classes, their attributes, operations (or methods), and the relationships among objects. The main classes of the Decision Support System are Decision, Information, Reseach, Projects, Invetigations, Researcher.

Defect Tracking System Class Diagram describes the structure of a Defect Tracking System classes, their attributes, operations (or methods), and the relationships among objects. The main classes of the Defect Tracking System are Bug, Register Bug, Developer, Project Manager, Tester, Quality.

Dental Clinic Class Diagram describes the structure of a Dental Clinic classes, their attributes, operations (or methods), and the relationships among objects. The main classes of the Dental Clinic are Problems, Patient, Doctors, Nurses, Appointments, Medicines.

Dental Hospital Management Class Diagram describes the structure of a Dental Hospital Management classes, their attributes, operations (or methods), and the relationships among objects. The main classes of the Dental Hospital Management are Dental Problems, Patient, Doctors, Nurses, Appointments, Medicines.

Deparment Store Management System Class Diagram describes the structure of a Deparment Store Management System classes, their attributes, operations (or methods), and the relationships among objects. The main classes of the Deparment Store Management System are Products, Sales, Payments, Discounts, Stock, Inventory.

Departmental Billing System Class Diagram describes the structure of a Departmental Billing System classes, their attributes, operations (or methods), and the relationships among objects. The main classes of the Departmental Billing System are Discounts, Stock, Inventory, Products, Sales, Payments.

Distributed Account Management System Class Diagram describes the structure of a Distributed Account Management System classes, their attributes, operations (or methods), and the relationships among objects. The main classes of the Distributed Account Management System are Transaction, Outlet, Stock Update, Credit Report, Sales, User.

Doctor Appointment System Class Diagram describes the structure of a Doctor Appointment System classes, their attributes, operations (or methods), and the relationships among objects. The main classes of the Doctor Appointment System are Doctors, Appointment, Booking, Fees, schedule, Clinics.

Doctors Information System Class Diagram describes the structure of a Doctors Information System classes, their attributes, operations (or methods), and the relationships among objects. The main classes of the Doctors Information System are Doctors, Degree, Fees, schedule, Clinics, Test.

E-Billing Management System Class Diagram describes the structure of a E-Billing Management System classes, their attributes, operations (or methods), and the relationships among objects. The main classes of the E-Billing Management System are Bills, Customer, Transactions, Login, Payment, Receipts.