CE Pro’s Julie Jacobson says:
Unity Systems and its founder Tom Riley produced arguably the first good home automation system. We hear from readers all the time that their systems keep on ticking after decades.
Certainly there are excellent and affordable modern-day systems that have the functionality you need. [links]
However, I suggest you start with a couple of dealers who still service Unity Systems. They might be able to tell you if your Unity Home Manager can be salvaged or if you can build on some of the existing components.
You might enjoy this link: http://www.cepro.com/slideshow/image/6436/
Be sure to check the comments below the story.