Even ancient Smalltalk-80 provided — "Within each project, a set of changes you make to class descriptions is maintained. … Using a browser view of this set of

Even ancient Smalltalk-80 provided — "Within each project, a set of changes you make to class descriptions is maintained. … Using a browser view of this set of changes, you can find out what you have been doing. Also, you can use the set of changes to create an external file containing descriptions of the modifications you have made to the system so that you can share your work with other users. … The storage of changes in the Smalltalk-80 system takes two forms: an internal form as a set of changes (actually a set of objects describing changes), and an external form as a file on which your actions are logged while you are working (in the form of executable expressions or expressions that can be filed into a system). … All the information stored in the internal change set is also written onto the changes file." 1984 Smalltalk-80 The Interactive Programming Environment page 461 https://rmod-files.lille.inria.fr/FreeBooks/TheInteractiveProgrammingEnv/TheInteractiveProgrammingEnv.pdf https://rmod-files.lille.inria.fr/FreeBooks/TheInteractivePr...