Comment by ethan_smith
6 months ago
QNX's true microkernel architecture (only 12KB) was the secret behind fitting a complete GUI OS with networking on a single floppy - most competing OSes used monolithic kernels that couldn't achieve this level of modularity and efficiency.
In 2002 I fit linux, X11, ethernet drivers (+ everything provided by busybox) and vnc and rdesktop on a single floppy.