1. Use Case diagram for the gas pump system
read & validate credit card
select fuel options
customer
dispense fuel
debit credit card
credit
card
company
<include>
print receipt

2. Context Diagram for an ATM system (used for both structured and object-oriented techniques)

3. A context diagram for a patient information system in a hospital.
Includes image storage for x-rays and a patient admissions system.
image database
medical
records
system
hospital
admissions
system
patient information
system
drug dispensing
system

4. Lacks details and need to be supplemented by DD

5. Class Diagram: Part of a Library class hierarchy
Name of object class
Class Diagram: Part of a Library class hierarchy
Class attributes
Object’s operations

6. Class Diagram: Object aggregation

7. State Diagram Microwave oven model