The key in making great and growable systems is much more to design how its modules communicate rather than what their internal properties and behaviors should be.
A Smalltalk system is a collection of entities communicating with each other through messages. That’s all, there is nothing more.
| • Communicating entities: | ||
| • Message send definitions: | ||
| • Message to string entities: | ||
| • Messages to number entities: | ||
| • A brief introduction to the system Browser: | ||
| • Spacewar! models: |