Slax 6.0.2

SLAX is fast and beautiful Linux operating system which fits on small (3.14") CD-ROM disc. It runs directly from the CD (or USB) without installing. The Live CD described here is based on the Slackware Linux distribution and uses Unification File System (also known as unionfs), allowing read-only filesystem to behave as a writable one, saving all changes to memory.

Imagine the ability to boot your favorite Linux distribution whether you are at home, at school, or at work. Imagine walking on the street and carrying the only thing you needed in life - the 8cm compact disk with your Live Linux CD.
When your computer boots from the LiveCD, the first step is loading the kernel image (vmlinuz). After this, a 4 MB ramdisk is created in the computer's RAM. The rootdisk image (initrd.gz) is then unpacked into it and mounted as a root filesystem. Large directories (like /usr) are mounted directly from the CDROM.

More info

Download for CD

Download for USB