http://www.toms.net/rb/:
1) tomsrtbt is
"The most GNU/Linux on one floppy disk"
for:
rescue recovery panic & emergencies
tools to keep in your shirt pockets
whenever you can't use a hard drive
Tomsrtbt stands for:
"Tom's floppy which has a root filesystem and is also bootable."
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2) Design goals
as much stuff as possible on 1 floppy disk
keep it self contained, build under itself
try to make it behave like a normal system
rescue and recovery functions get priority