Plan 9 from Bell Labs

E162097

distributed operating system research operating system

Plan 9 from Bell Labs is a distributed operating system developed at Bell Labs as a successor to Unix, emphasizing a unified file-oriented approach to all system resources.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (16)

Label	Occurrences
Plan 9 from Bell Labs canonical	17
Plan 9	5
Plan 9 operating system	4
Plan 9 CPU-server architecture	1
Plan 9 design principles	1
Plan 9 file server model	1
Plan 9 from Bell Labs distribution	1
Plan 9 from Bell Labs operating system	1
Plan 9 kernel	1
Plan 9 kernel server	1
Plan 9 manual pages	1
Plan 9 namespace model	1
Plan 9 terminal emulator acme	1
Plan 9 terminal-server architecture	1
Plan 9 user environment	1
Plan 9 window system 8½	1

How this entity was disambiguated

This entity first appeared as the object of triple T1413068 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Plan 9 from Bell Labs
Context triple: [Ken Thompson, coCreatorOf, Plan 9 from Bell Labs]

A. GNU Hurd
GNU Hurd is the GNU Project’s microkernel-based operating system server collection intended as a free Unix-like replacement, built to run on top of the Mach microkernel.
B. Algol W
Algol W is a block-structured, high-level programming language designed by Niklaus Wirth as a successor to ALGOL 60, incorporating features that influenced the later development of Pascal and other languages.
C. UCSD p-System
UCSD p-System is a portable operating system and programming environment based on the Pascal language and p-code virtual machine, widely used in the late 1970s and early 1980s across multiple hardware platforms.
D. Squeak programming system
The Squeak programming system is an open-source, multimedia-capable implementation of the Smalltalk language designed for educational use, rapid prototyping, and exploratory programming.
E. The GNU Manifesto
The GNU Manifesto is Richard Stallman’s foundational essay outlining the philosophy, goals, and rationale for the free software movement and the GNU Project.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Plan 9 from Bell Labs
Target entity description: Plan 9 from Bell Labs is a distributed operating system developed at Bell Labs as a successor to Unix, emphasizing a unified file-oriented approach to all system resources.

A. GNU Hurd
GNU Hurd is the GNU Project’s microkernel-based operating system server collection intended as a free Unix-like replacement, built to run on top of the Mach microkernel.
B. Algol W
Algol W is a block-structured, high-level programming language designed by Niklaus Wirth as a successor to ALGOL 60, incorporating features that influenced the later development of Pascal and other languages.
C. UCSD p-System
UCSD p-System is a portable operating system and programming environment based on the Pascal language and p-code virtual machine, widely used in the late 1970s and early 1980s across multiple hardware platforms.
D. Squeak programming system
The Squeak programming system is an open-source, multimedia-capable implementation of the Smalltalk language designed for educational use, rapid prototyping, and exploratory programming.
E. The GNU Manifesto
The GNU Manifesto is Richard Stallman’s foundational essay outlining the philosophy, goals, and rationale for the free software movement and the GNU Project.
F. None of above. chosen

Statements (52)

Predicate	Object
instanceOf	distributed operating system ⓘ research operating system ⓘ
alternativeName	Plan 9 ⓘ linked to: Plan 9 from Bell Labs
architecture	distributed ⓘ
basedOn	Unix ⓘ
countryOfOrigin	United States ⓘ linked to: United States of America
designedAsSuccessorTo	Unix ⓘ
developer	AT&T Bell Laboratories ⓘ linked to: Bell Telephone Laboratories Bell Labs ⓘ linked to: Bell Telephone Laboratories Dave Presotto ⓘ Dennis Ritchie ⓘ Ken Thompson ⓘ Phil Winterbottom ⓘ Rob Pike ⓘ
inception	1987 ⓘ late 1980s ⓘ
includesComponent	acme text editor ⓘ plumber interprocess communication service ⓘ rio window system ⓘ sam text editor ⓘ
influenced	Go programming language tooling culture ⓘ Inferno operating system ⓘ Linux /proc file system ⓘ namespaces in modern operating systems ⓘ
influencedBy	Unix design philosophy ⓘ
initialRelease	1992 ⓘ early 1990s ⓘ
kernelType	microkernel-like ⓘ
keyConcept	/proc process file system ⓘ 9P network protocol ⓘ everything is a file ⓘ file-oriented interface to all resources ⓘ per-process name spaces ⓘ
license	Lucent Public License ⓘ open source license ⓘ
namedAfter	Plan 9 from Outer Space (1959 film) ⓘ linked to: Plan 9 from Outer Space
networkProtocol	9P ⓘ
notableFeature	lightweight terminals connected to central servers ⓘ uniform file system interface for devices ⓘ
notableRelease	Fourth Edition ⓘ
operatingSystemFamily	Unix-like operating system ⓘ
programmingLanguage	C ⓘ
sourceModel	later open source ⓘ originally proprietary ⓘ
supports	distributed computing ⓘ transparent resource sharing over a network ⓘ
targetHardware	MIPS ⓘ PowerPC ⓘ SPARC ⓘ linked to: SPARC microprocessor architecture x86 ⓘ
userInterface	rio window system ⓘ
website	https://9p.io/plan9/ ⓘ

How these facts were elicited

Referenced by (39)

Full triples — surface form annotated when it differs from this entity's canonical label.

Ken Thompson → coCreatorOf → Plan 9 from Bell Labs ⓘ

Ken Thompson → notableWork → Plan 9 from Bell Labs ⓘ

Rob Pike → knownFor → Plan 9 from Bell Labs ⓘ

Rob Pike → workedOn → Plan 9 from Bell Labs ⓘ

Rob Pike → notableWork → Plan 9 from Bell Labs ⓘ

Plan 9 from Bell Labs → alternativeName → Plan 9 ⓘ