PDP-11
E183936
The PDP-11 is a series of 16-bit minicomputers introduced by Digital Equipment Corporation in the 1970s that became highly influential in computer architecture and operating system development.
All labels observed (14)
| Label | Occurrences |
|---|---|
| PDP-11 canonical | 9 |
| DEC PDP-11 | 2 |
| PDP-11/20 | 2 |
| PDP-11/40 | 2 |
| PDP-11/45 | 2 |
| PDP-11/70 | 2 |
| PDP-11 (at instruction-set level via compatibility mode) | 1 |
| PDP-11 family | 1 |
| PDP-11/34 | 1 |
| PDP-11/44 | 1 |
| PDP-11/73 | 1 |
| PDP-11/83 | 1 |
| PDP-11/84 | 1 |
| PDP-11/94 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1612014 — 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.
Target entity: PDP-11 Context triple: [Unix, laterPlatform, PDP-11]
-
A.
PDP-7
The PDP-7 was a 1960s DEC minicomputer whose relatively low cost and flexible design made it popular in research labs and notable as the machine on which the first version of Unix was developed.
-
B.
Honeywell 316 minicomputer
The Honeywell 316 minicomputer was a small, 16-bit general-purpose computer from the late 1960s widely used in early networking and control applications.
-
C.
COSMAC ELF computer
The COSMAC ELF computer is a simple, low-cost, build-it-yourself microcomputer from the late 1970s that became popular among hobbyists for learning and experimenting with early personal computing.
-
D.
Honeywell DDP-516 minicomputer
The Honeywell DDP-516 minicomputer was a rugged, 16-bit computer from the 1960s widely used in real-time and military applications, notably serving as the hardware platform for the original ARPANET Interface Message Processors.
-
E.
IBM 700/7000 series
The IBM 700/7000 series was a family of early large-scale mainframe computers from the 1950s and early 1960s that played a key role in scientific, engineering, and business computing before the advent of more standardized systems.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: PDP-11 Target entity description: The PDP-11 is a series of 16-bit minicomputers introduced by Digital Equipment Corporation in the 1970s that became highly influential in computer architecture and operating system development.
-
A.
PDP-7
The PDP-7 was a 1960s DEC minicomputer whose relatively low cost and flexible design made it popular in research labs and notable as the machine on which the first version of Unix was developed.
-
B.
Honeywell 316 minicomputer
The Honeywell 316 minicomputer was a small, 16-bit general-purpose computer from the late 1960s widely used in early networking and control applications.
-
C.
COSMAC ELF computer
The COSMAC ELF computer is a simple, low-cost, build-it-yourself microcomputer from the late 1970s that became popular among hobbyists for learning and experimenting with early personal computing.
-
D.
Honeywell DDP-516 minicomputer
The Honeywell DDP-516 minicomputer was a rugged, 16-bit computer from the 1960s widely used in real-time and military applications, notably serving as the hardware platform for the original ARPANET Interface Message Processors.
-
E.
IBM 700/7000 series
The IBM 700/7000 series was a family of early large-scale mainframe computers from the 1950s and early 1960s that played a key role in scientific, engineering, and business computing before the advent of more standardized systems.
- F. None of above. chosen
Statements (68)
| Predicate | Object |
|---|---|
| instanceOf |
computer architecture platform
ⓘ
minicomputer series ⓘ |
| computerArchitectureType | 16-bit architecture ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| familyMember |
PDP-11
self-linksurface differs
ⓘ
surface form:
PDP-11/20
PDP-11 self-linksurface differs ⓘ
surface form:
PDP-11/34
PDP-11 self-linksurface differs ⓘ
surface form:
PDP-11/40
PDP-11 self-linksurface differs ⓘ
surface form:
PDP-11/44
PDP-11 self-linksurface differs ⓘ
surface form:
PDP-11/45
PDP-11 self-linksurface differs ⓘ
surface form:
PDP-11/70
PDP-11 self-linksurface differs ⓘ
surface form:
PDP-11/73
PDP-11 self-linksurface differs ⓘ
surface form:
PDP-11/83
PDP-11 self-linksurface differs ⓘ
surface form:
PDP-11/84
PDP-11 self-linksurface differs ⓘ
surface form:
PDP-11/94
|
| hasAddressSpace | 16-bit address space ⓘ |
| hasBusArchitecture |
Q-bus
ⓘ
Unibus ⓘ |
| hasInstructionSet | PDP-11 instruction set ⓘ |
| hasRegister |
R0
ⓘ
R1 ⓘ R2 ⓘ R3 ⓘ R4 ⓘ R5 ⓘ R6 (stack pointer) ⓘ R7 (program counter) ⓘ |
| hasRegisterCount | 8 general-purpose registers ⓘ |
| influenced |
BSD
ⓘ
surface form:
BSD Unix
C programming language implementation practices ⓘ Motorola 68000 family ⓘ
surface form:
Motorola 68000 architecture
Unix operating system design ⓘ VAX ⓘ computer architecture education ⓘ |
| introducedInYear | 1970 ⓘ |
| laterModelsSupport |
memory management unit
ⓘ
separate instruction and data spaces ⓘ up to 4 MB of memory with segmentation ⓘ |
| manufacturer | Digital Equipment Corporation ⓘ |
| marketSegment | minicomputer market ⓘ |
| maxAddressableMemory | 64 KB in basic models ⓘ |
| notableFor |
influence on later minicomputers and microprocessors
ⓘ
orthogonal instruction set ⓘ simple and elegant architecture ⓘ widespread use in universities ⓘ |
| operatingSystem |
BSD
ⓘ
surface form:
2.11BSD
BSD ⓘ
surface form:
2BSD
RSTS/E ⓘ RSX-11 ⓘ RT-11 ⓘ Unix ⓘ
surface form:
UNIX
V7 UNIX ⓘ |
| productionPeriod |
1970s
ⓘ
1980s ⓘ |
| successor |
VAX
ⓘ
surface form:
VAX-11
|
| supports |
autodecrement addressing
ⓘ
autoincrement addressing ⓘ byte addressing ⓘ general-purpose registers ⓘ memory-mapped I/O ⓘ |
| usedFor |
industrial control
ⓘ
laboratory automation ⓘ real-time systems ⓘ scientific computing ⓘ time-sharing systems ⓘ |
| usedIn |
Bell Labs for Unix development
ⓘ
academic computer science departments ⓘ industrial process control systems ⓘ |
| wordSize | 16-bit ⓘ |
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.
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.
Subject: PDP-11 Description of subject: The PDP-11 is a series of 16-bit minicomputers introduced by Digital Equipment Corporation in the 1970s that became highly influential in computer architecture and operating system development.
Referenced by (27)
Full triples — surface form annotated when it differs from this entity's canonical label.