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KolibriOS nightly build desktop
Developer KolibriOS Project Team
Written in Fasm
Working state Active
Source model Open source
Latest release Nightly / April 01, 2014
Available in English, Russian, Italian, Spanish
Platforms x86
Kernel type Monolithic
Default user interface KolibriOS Kernel API
License GNU General Public License
Preceded by MenuetOS
Official website www.kolibrios.org

Kolibri or KolibriOS is a small open source x86 operating system written completely in assembly. It was forked off from MenuetOS[1] in 2004 and has run under independent development since.


  • Pre-emptive multitasking, streams, parallel execution of system calls
  • Boots in few seconds from various devices; NTFS and Ext2/3 also supported. Can be started from Coreboot and Windows (Windows will shutdown)
  • Graphical user interface based on and optimized for VESA
  • Development kit: code editor with a macro-assembler (FASM) integrated
  • Most distributives will fit on a single 1.44 MB Floppy image

System requirements[edit]

  • i586 compatible CPU required
  • 8 MB of RAM[2]
  • VESA-compatible videocard
  • 1.44MB 3.5" floppy drive, hard disk, USB Flash or CD-drive
  • Keyboard and mouse (COM, PS/2 or USB)

Supported hardware[edit]

Development branches[edit]

  • KolibriACPI: extended ACPI support
  • KolibriNET: extended network support
  • Kolibri-A: embeddable version fiercely optimized for AMD Fusion platforms

External links[edit]

Other reviews:


  1. ^ www.kolibrios.org
  2. ^ KolibriOS – A tiny operating system on a 1.44MB floppy