Windows 3 is the third release of the Microsoft operating system. Windows 3 is not a true operating system but rather an operating environment running on top of DOS. There were several versions, each introduced new features.
My family's first computer was a Packard Bell 386 SX running Windows 3.0 With Multimedia Extensions and I spent a lot of time playing around with the program. Looking back on it now, it's surprising how little there is to do with it.