Real-Time System Executive for the PDP-11
E805875
DEC operating system
multi-user operating system
multitasking operating system
real-time operating system
Real-Time System Executive for the PDP-11 is a family of multi-user, multitasking real-time operating systems developed by Digital Equipment Corporation for its PDP-11 minicomputers.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Versatile Real-Time Executive | 2 |
| Real-Time System Executive for the PDP-11 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9532668 — 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: Real-Time System Executive for the PDP-11 Context triple: [RSX-11, abbreviationOf, Real-Time System Executive for the PDP-11]
-
A.
CTSS time-sharing system
The CTSS time-sharing system was one of the first operating systems to allow multiple users to interact with a computer simultaneously, pioneering modern time-sharing and interactive computing.
-
B.
Control Program for Microcomputers
Control Program for Microcomputers is an early operating system widely used on 8-bit microcomputers in the late 1970s and early 1980s, known for influencing the design of later systems like MS-DOS.
-
C.
"How to Make a Multiprocessor Computer That Correctly Executes Multiprocess Programs"
"How to Make a Multiprocessor Computer That Correctly Executes Multiprocess Programs" is a seminal paper by Leslie Lamport that introduced foundational concepts for ensuring correctness and consistency in concurrent and multiprocessor systems.
-
D.
Multics
Multics (Multiplexed Information and Computing Service) was an influential pioneering time-sharing operating system developed in the 1960s that introduced many concepts later adopted by modern operating systems, including Unix.
-
E.
IBM 7090 operating environment
The IBM 7090 operating environment is the system software and runtime framework that supported program execution, compilation, and job control on IBM’s 7090 mainframe computer.
- 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: Real-Time System Executive for the PDP-11 Target entity description: Real-Time System Executive for the PDP-11 is a family of multi-user, multitasking real-time operating systems developed by Digital Equipment Corporation for its PDP-11 minicomputers.
-
A.
CTSS time-sharing system
The CTSS time-sharing system was one of the first operating systems to allow multiple users to interact with a computer simultaneously, pioneering modern time-sharing and interactive computing.
-
B.
Control Program for Microcomputers
Control Program for Microcomputers is an early operating system widely used on 8-bit microcomputers in the late 1970s and early 1980s, known for influencing the design of later systems like MS-DOS.
-
C.
"How to Make a Multiprocessor Computer That Correctly Executes Multiprocess Programs"
"How to Make a Multiprocessor Computer That Correctly Executes Multiprocess Programs" is a seminal paper by Leslie Lamport that introduced foundational concepts for ensuring correctness and consistency in concurrent and multiprocessor systems.
-
D.
Multics
Multics (Multiplexed Information and Computing Service) was an influential pioneering time-sharing operating system developed in the 1960s that introduced many concepts later adopted by modern operating systems, including Unix.
-
E.
IBM 7090 operating environment
The IBM 7090 operating environment is the system software and runtime framework that supported program execution, compilation, and job control on IBM’s 7090 mainframe computer.
- F. None of above. chosen
Statements (36)
| Predicate | Object |
|---|---|
| instanceOf |
DEC operating system
ⓘ
multi-user operating system ⓘ multitasking operating system ⓘ real-time operating system ⓘ |
| belongsTo | Digital Equipment Corporation operating system portfolio ⓘ |
| category |
PDP-11 operating system
ⓘ
real-time executive ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| designedFor |
PDP-11
ⓘ
minicomputer ⓘ |
| developer | Digital Equipment Corporation ⓘ |
| era | 1970s computing ⓘ |
| familyOf | real-time operating systems ⓘ |
| intendedUse |
process control
ⓘ
real-time control ⓘ time-critical applications ⓘ |
| manufacturer |
Digital Equipment Corporation
ⓘ
linked to:
Digital Equipment Corporation (DEC)
|
| operatedOn | PDP-11 peripherals ⓘ |
| platform |
PDP-11 minicomputer line
ⓘ
linked to:
PDP-11
|
| relatedTo |
PDP-11 hardware family
ⓘ
linked to:
PDP-11
RSX-11 ⓘ RT-11 ⓘ |
| supports |
concurrent tasks
ⓘ
device control ⓘ inter-process communication ⓘ multi-user ⓘ multiple users ⓘ multitasking ⓘ real-time processing ⓘ real-time scheduling ⓘ resource sharing among users ⓘ task management ⓘ |
| targetHardware | 16-bit PDP-11 architecture ⓘ |
| usedIn |
data acquisition systems
ⓘ
embedded control applications ⓘ industrial control 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: Real-Time System Executive for the PDP-11 Description of subject: Real-Time System Executive for the PDP-11 is a family of multi-user, multitasking real-time operating systems developed by Digital Equipment Corporation for its PDP-11 minicomputers.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Real-Time System Executive for the PDP-11
linked to: Real-Time System Executive for the PDP-11