| Damn Small Linux 50 MB 💻 |
Graphical Linux with 2.4 kernel, Firefox 2.0 and more. Takes 1 minute to boot. |
| Buildroot Linux 5.0 MB >_ |
Minimal Linux with busybox, Lua, tests, internet access, ping, telnet and curl. Exchange files through /mnt/. |
| ReactOS 18 MB 💻 |
Windows-compatible OS with QtWeb and Breakout. Restored from snapshot. |
| Windows 2000 22 MB 💻 |
Including Pinball and Internet Explorer with internet access. Additional sectors are loaded as needed. |
| Windows 98 9.7 MB 💻 |
Including Minesweeper and Internet Explorer with internet access. Additional sectors are loaded as needed. |
| Windows 95 4.6 MB 💻 |
Restored from snapshot |
| Windows 3.1 15 MB 💻 |
Takes 15 seconds to boot |
| Windows 1.01 0.6 MB 💻 |
The first version of Microsoft Windows |
| MS-DOS 6.22 4.4 MB >_ |
With Enhanced Tools, QBasic, vim, games and demos. |
| FreeDOS 0.5 MB >_ |
With nasm, vim, debug.com, Rogue, some games and demos. |
| FreeBSD 17 MB >_ |
FreeBSD 12.0 base install. Restored from snapshot. |
| OpenBSD 12 MB >_ |
OpenBSD 6.6 base install. Restored from snapshot. |
| 9front 4.4 MB 💻 |
A Plan 9 fork. |
| Haiku 38 MB 💻 |
An open-source operating system inspired by BeOS. Restored from snapshot. Includes network support. |
| SerenityOS 17 MB 💻 |
A graphical Unix-like operating system. Restored from snapshot. |
| HelenOS 7.9 MB 💻 |
A graphical operating system based on a multiserver microkernel design |
| FiwixOS 15 MB >_ |
A Unix-like OS written from scratch. Includes Doom. |
| Android-x86 42 MB 💻 |
An x86 port of the Android 1.6. Quite slow. Takes about 3 minutes to boot. |
| Oberon 1.2 MB 💻 |
Native Oberon 2.3.6 |
| KolibriOS 1.4 MB 💻 |
Fast graphical OS written in Assembly |
| QNX 1.3 MB 💻 |
QNX 4.05 Demo disk (no networking) |
| Snowdrop 0.3 MB >_ |
A homebrew operating system from scratch, written in assembly language |
| Solar OS 0.3 MB 💻 |
Simple graphical OS |
| Bootchess 512 B >_ |
A tiny chess program written in the boot sector |
| SectorLISP 512 B >_ |
A LISP interpreter that fits into the boot sector |