> Did you use SCM, automated testing and design patterns 20 years ago ? If yes do you think this was the norm in the industry ? Just because people did not use

> Did you use SCM, automated testing and design patterns 20 years ago ? If yes do you think this was the norm in the industry ? Just because people did not use a standalone program for version control does not mean that they did not version their code. This goes all the way back to card/tape drawers and paper tape revisions (there is a great anecdote about this in Steven Levy's Hackers). Look at software from the late 1970s/early 1980s - there will be versioning information there, and usually changelogs describing what was changed. A lot of operating systems also had file versioning built into the filesystem (https://en.wikipedia.org/wiki/Versioning_file_system#Implementations https://en.wikipedia.org/wiki/Versioning_file_system#Impleme...) that was used for revision control. Since most of these OSes were timesharing systems this was in effect team-based version control.