Inferno (operating system)

Inferno
Inferno 4th Edition
Developer	Inferno Bell Labs, Vita Nuova Holdings, Terzarima Systems Inferno64: Caerwyn Jones
Written in	C, Limbo
Working state	Inferno Current; No paid support avaliable Inferno64: Current
Source model	Open-source
Initial release	Inferno Bell Labs Release 1996 (1996) Inferno64: 2022 (2022)
Latest release	Inferno 4th Edition / inferno-os April 21, 2026 (2026-04-21) Inferno64: July 8, 2026 (2026-07-08)
Repository	Inferno https://github.com/inferno-os/inferno-os Inferno64 https://github.com/caerwynj/inferno64
Available in	English
Supported platforms	Inferno: ARM, RISC-V, x86 Inferno64: AArch64, x86-64 Historic: AMD 29k, MIPS, PowerPC, SPARC, PA-RISC, SH-4
Kernel type	Virtual machine (Dis)
Influenced by	Research Unix, Plan 9
Default user interface	Tk based WM
License	2021: MIT 2005: Dual 2003: Dual 2000: Inferno Original: Proprietary
Official website	Inferno github.com/inferno-os/inferno-os Inferno64 inferno64.org

Inferno is a MIT Licensed distributed operating system started in 1995 at Bell Labs, which is now held by Vita Nuova Holdings and maintained by Terzarima Systems. Inferno was based on the experience gained with Plan 9 from Bell Labs, and the further research of Bell Labs into operating systems, languages, on-the-fly compilers, graphics, security, networking and portability.