PDP-9
E704365
The PDP-9 was a 1960s 18-bit minicomputer from Digital Equipment Corporation that introduced advanced features and improved performance over its predecessors in the PDP series.
All labels observed (1)
| Label | Occurrences |
|---|---|
| PDP-9 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7894569 — 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: PDP-9 Context triple: [PDP-7, successor, PDP-9]
-
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.
PDP-8
The PDP-8 is a pioneering 12-bit minicomputer introduced in the 1960s that became widely known for its low cost, compact size, and major role in popularizing minicomputers in industry and education.
-
C.
PDP-6
The PDP-6 was a 36-bit mainframe computer developed by Digital Equipment Corporation in the 1960s, notable for its time-sharing capabilities and influence on later PDP-10 systems.
-
D.
PDP-10
The PDP-10 was a family of mainframe computers produced by Digital Equipment Corporation in the late 1960s and 1970s, widely used in research and time-sharing systems and influential in the development of early programming languages and operating systems.
-
E.
PDP-11
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.
- 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: PDP-9 Target entity description: The PDP-9 was a 1960s 18-bit minicomputer from Digital Equipment Corporation that introduced advanced features and improved performance over its predecessors in the PDP series.
-
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.
PDP-8
The PDP-8 is a pioneering 12-bit minicomputer introduced in the 1960s that became widely known for its low cost, compact size, and major role in popularizing minicomputers in industry and education.
-
C.
PDP-6
The PDP-6 was a 36-bit mainframe computer developed by Digital Equipment Corporation in the 1960s, notable for its time-sharing capabilities and influence on later PDP-10 systems.
-
D.
PDP-10
The PDP-10 was a family of mainframe computers produced by Digital Equipment Corporation in the late 1960s and 1970s, widely used in research and time-sharing systems and influential in the development of early programming languages and operating systems.
-
E.
PDP-11
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.
- F. None of above. chosen
Statements (51)
| Predicate | Object |
|---|---|
| instanceOf |
PDP computer
ⓘ
minicomputer ⓘ |
| addressSpace | 4K to 32K words ⓘ |
| architecture | 18-bit architecture ⓘ |
| busWidth | 18-bit data paths ⓘ |
| consoleType |
optional CRT display
ⓘ
teletypewriter console ⓘ |
| cpuTechnology | discrete transistor logic ⓘ |
| decadeOfIntroduction | 1960s ⓘ |
| family | DEC 18-bit family NERFINISHED ⓘ |
| formFactor | rack-mounted ⓘ |
| instructionSetCompatibility | PDP-7 compatible ⓘ |
| introductionDate | 1966 ⓘ |
| logicFamily | DEC System Module logic NERFINISHED ⓘ |
| manufacturer | Digital Equipment Corporation NERFINISHED ⓘ |
| marketSegment |
industrial control
ⓘ
laboratory automation ⓘ scientific computing ⓘ |
| maxMemorySize | 32K words ⓘ |
| memoryType | magnetic core memory ⓘ |
| notableFeature |
enhanced instruction set over PDP-7
ⓘ
hardware multiply-divide option ⓘ improved performance over PDP-7 ⓘ memory protection options ⓘ microprogrammed control ⓘ |
| numericRepresentation | two’s complement ⓘ |
| operatingSystem |
DECsys-9
NERFINISHED
ⓘ
DIAL NERFINISHED ⓘ FOCAL-9 NERFINISHED ⓘ |
| powerRequirement | mains-powered, rack-mounted system ⓘ |
| predecessor | PDP-7 NERFINISHED ⓘ |
| primaryInputOutput |
disk storage (optional)
ⓘ
magnetic tape (optional) ⓘ paper tape ⓘ |
| relatedTo |
PDP-15
NERFINISHED
ⓘ
PDP-4 NERFINISHED ⓘ PDP-7 NERFINISHED ⓘ |
| series | PDP series NERFINISHED ⓘ |
| successor | PDP-15 NERFINISHED ⓘ |
| supportsFloatingPoint | optional hardware ⓘ |
| supportsIndexRegisters | yes ⓘ |
| supportsTimeSharing | yes ⓘ |
| usageRegion |
Europe
NERFINISHED
ⓘ
North America NERFINISHED ⓘ academic institutions ⓘ industrial sites ⓘ research laboratories ⓘ |
| vendor | Digital Equipment Corporation NERFINISHED ⓘ |
| wordFormat | one sign bit and 17 magnitude bits ⓘ |
| wordLengthInBits | 18 ⓘ |
| wordSize | 18-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.
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: PDP-9 Description of subject: The PDP-9 was a 1960s 18-bit minicomputer from Digital Equipment Corporation that introduced advanced features and improved performance over its predecessors in the PDP series.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.