4.2BSD
E828994
4.2BSD is a historically significant version of the Berkeley Software Distribution Unix operating system that introduced major networking and filesystem innovations, including early TCP/IP support.
All labels observed (3)
| Label | Occurrences |
|---|---|
| 4.2BSD canonical | 14 |
| 4.2BSD System Manual | 1 |
| Berkeley Software Distribution 4.2 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9900389 — 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: 4.2BSD Context triple: [BSD, hasVariant, 4.2BSD]
-
A.
4.1BSD
4.1BSD is an early version of the Berkeley Software Distribution of Unix that introduced significant improvements in performance, networking, and system utilities, influencing later Unix and BSD derivatives.
-
B.
386BSD
386BSD is an early free Unix-like operating system for Intel 80386-based PCs that served as a precursor to modern BSD variants such as FreeBSD and NetBSD.
-
C.
OpenBSD
OpenBSD is a free, security-focused, Unix-like operating system known for its code correctness, proactive security features, and integrated cryptographic tools.
-
D.
OSF/1
OSF/1 was a Unix-like operating system developed by the Open Software Foundation that integrated Mach microkernel technology with BSD and System V features for high-end workstations and servers.
-
E.
BSD
BSD (Berkeley Software Distribution) is a family of Unix-like operating systems derived from research at the University of California, Berkeley, known for their permissive licensing and influence on many modern OSes.
- 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: 4.2BSD Target entity description: 4.2BSD is a historically significant version of the Berkeley Software Distribution Unix operating system that introduced major networking and filesystem innovations, including early TCP/IP support.
-
A.
4.1BSD
4.1BSD is an early version of the Berkeley Software Distribution of Unix that introduced significant improvements in performance, networking, and system utilities, influencing later Unix and BSD derivatives.
-
B.
386BSD
386BSD is an early free Unix-like operating system for Intel 80386-based PCs that served as a precursor to modern BSD variants such as FreeBSD and NetBSD.
-
C.
OpenBSD
OpenBSD is a free, security-focused, Unix-like operating system known for its code correctness, proactive security features, and integrated cryptographic tools.
-
D.
OSF/1
OSF/1 was a Unix-like operating system developed by the Open Software Foundation that integrated Mach microkernel technology with BSD and System V features for high-end workstations and servers.
-
E.
BSD
BSD (Berkeley Software Distribution) is a family of Unix-like operating systems derived from research at the University of California, Berkeley, known for their permissive licensing and influence on many modern OSes.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Berkeley Software Distribution
ⓘ
Unix operating system ⓘ computer operating system release ⓘ |
| basedOn | 4.1BSD ⓘ |
| codename |
Berkeley Software Distribution 4.2
ⓘ
linked to:
4.2BSD
|
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| developer |
Computer Systems Research Group
ⓘ
University of California, Berkeley ⓘ |
| distributionModel | source code distribution ⓘ |
| documentation |
4.2BSD System Manual
ⓘ
linked to:
4.2BSD
|
| historicalPeriod | early 1980s ⓘ |
| includesComponent |
Berkeley Fast File System
ⓘ
TCP/IP stack ⓘ job control in the shell ⓘ select system call ⓘ sockets API ⓘ virtual memory improvements ⓘ |
| includesProgram |
Berkeley network utilities
ⓘ
linked to:
Berkeley r-commands
csh ⓘ
linked to:
C shell
vi editor ⓘ
linked to:
vi
|
| influenced |
4.3BSD
ⓘ
BSD Unix derivatives ⓘ SunOS ⓘ System V Release 4 networking ⓘ
linked to:
UNIX System V
design of modern Unix filesystems ⓘ early TCP/IP implementations on other Unix systems ⓘ |
| introducedFeature |
4.2BSD sockets API
ⓘ
linked to:
BSD sockets API
Berkeley Fast File System ⓘ improved virtual memory system ⓘ integrated TCP/IP networking ⓘ job control in csh ⓘ select system call for I/O multiplexing ⓘ |
| kernelType | monolithic kernel ⓘ |
| license | proprietary with source license ⓘ |
| networkingModel | TCP/IP ⓘ |
| notableFor |
Fast File System design
ⓘ
linked to:
Fast File System
early full TCP/IP implementation in Unix ⓘ influence on later Unix variants ⓘ influential sockets networking interface ⓘ |
| operatingSystemFamily | Unix ⓘ |
| partOf | Berkeley Software Distribution family ⓘ |
| primaryArchitecture | VAX ⓘ |
| releaseDate | 1983-08-01 ⓘ |
| status | historical, no longer maintained ⓘ |
| successor | 4.3BSD ⓘ |
| supportsArchitecture |
DEC VAX
ⓘ
linked to:
VAX
|
| targetUse |
research computing environments
ⓘ
time-sharing systems ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: 4.2BSD Description of subject: 4.2BSD is a historically significant version of the Berkeley Software Distribution Unix operating system that introduced major networking and filesystem innovations, including early TCP/IP support.
Referenced by (16)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: 4.2BSD