Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Much has been written about resource hungry operating systems. Microsoft Vista or even various GNU/Linux desktop editions, which can't be happy unless you throw gigabytes of RAM at them. Today I came across an operating system that can truly claim to be light-weight. It is called Kolibri. Check this out:
* The complete ISO is 4.4 MB in size (when zipped it's 2.8 MB, so you can basically send it around as email attachment, if you really want to).
* It's completely written in assembler.
* It has a nicely working graphical user interface (see the screenshots here).
* You can install it in VirtualBox (other VM solutions may work as well, but VirtualBox is the one I tried).
*It boots from boot-loader into the GUI in around two (2!) seconds!