JS/UIX
Just For Fun!

http://www.masswerk.at/jsuix/

JS/UIX is a virtual terminal and UN*X-like operating system for web browsers.
It is written completely in JavaScript using DHTML for the display

What For?
First of all, because it's possible.
Second this could well be the basis for some fail-safe remote-job-systems
needing a local environment for command parsing, interpretation and/or exe-
cution. Think of 'rlogin' to a remote host (via a CGI-process) for an example.