KolibriOS: a full operating system in 1.44 Megabytes
KolibriOS is an open source operating system with a monolithic preemptive kernel, video drivers, for 32-bit x86 architecture computers.
The entire operating system with a good set of application fits into a 1.44 Mb Floppy Disk.
The project is an open source fork of MenuetOS, written entirely in Flat Assembler:
Kolibri features a rich set of applications that include word processor, image viewer, graphical editor, web browser and some games.
Full FAT12/16/32 support is implemented, NTFS Ext2/3/4 are supported in ReadOnly mode.
Finally, drivers are written for popular sound, network and graphics cards.
How to try Kolibri?
On your linux box you can easily run Kolibri FD image using QEMU.
First, install QUEMU:
sudo apt install qemu-system-x86
Then, download and unzip the Floppy Disk image: http://builds.kolibrios.org/eng/latest-distr.7z
Finally, run FD image using QEMU:
qemu-system-i386 -L . -m 256 -fda ./kolibri.img -boot a -vga vmware -net nic,model=rtl8139 -net user -soundhw ac97 -usb -usbdevice tablet