It began so well. Microsoft wrote DOS. They started small and they created an operating system for the IBM PC that opened up a new world for the common, everyday programmer. DOS was sometimes a bit tricky. I recall issues with getting printers and modems to work. There was no graphic user interfaces. There was no multitasking. You ran a program. You finished and you ran a different program. Looking back, it was quite primitive. But, remarkably, the industry thrived throughout the 80s.