Figure 3.1. UML class diagram for an ATM

UML class diagram for an ATM

Figure 3.2. Narrative object model for an ATM

Narrative object model for an ATM

Figure 3.4. Object relationships for Twitter

Object relationships for Twitter

Figure 3.5. Object relationships for an e-commerce system

Object relationships for an e-commerce system

Figure 3.18. Object relationships for Slack

Object relationships for Slack