Smalltalk-80 Public Release

The official public release of Smalltalk-80, a full object-oriented programming environment that included a sophisticated UI and application framework, including the MVC pattern.

Significance

This was the first widespread demonstration of a cohesive, object-oriented application framework. It showed how a complete interactive environment could be built and extended with an 'inverted control' architecture, profoundly influencing subsequent GUI and OOP framework design.