RUNT Linux is an acronym for ResNet USB Network Tester. It is one of many Linux distros designed to run from a USB flash drive. RUNT is based on Slackware's bare kernel. Originally designed as a network tool for students at North Carolina State University. It consists of a boot floppy image and a zip file, similar to zipslack. It is intended to be a fairly complete Linux installation for use as a testing tool capable of booting on any x86 computer with a usb port and a bootable floppy.
References
RUNT Linux Wikipedia(Text) CC BY-SA