WebOS definition (or webtop):

WebOS is a virtual operating system that runs in your web browser.
The next article by frantic industries shows us 10 WebOS, maybe some of them are not fully finished.

The beginning of the article:

Big WebOS roundup - 10 online operating systems reviewed
Published December 21st, 2006 in Features, Web 2.0, Web, Reviews Tags: online OS, web, web 2.0, WebOS.

While we’re waiting for Google to launch its own Google OS (if the rumours are true, of course), I’ve checked out 10 web operating systems and what they can do. Not many of them feel like finished and fully usable products, but there are some true gems among them.
Admit it: you didn’t think there were that many WebOSes around, did you?...
It continues here.

The 10 WebOS are:

1. Craythur, wikipedia
2. Desktoptwo, wikipedia
3. eyeOS, wikipedia
4. Glide
5. Goowy
6. Orca
7. Purefect, wikipedia
8. SSOE, wikipedia
9. XinDESK, wikipedia
10. YouOS, wikipedia

Info on Wikipedia

Other WebOS not mentioned here:

- Robin
- LFS Desktop
- divine, wikipedia

What do you think?