Is Geos an alternative to Windows?
That depends on what you mean by alternative. It won’t run Windows applications, but it will provide you with a lot of functionality that Windows won’t, especially if you have a low-end machine (less than a ‘386, and/or less than 4 megabytes of RAM). You can run the desktop version from most other operating system like Win95/98, OS/2, or even Linux, in which case it acts like a sophisticated, integrated application suite and environment.