ZX81
E533739
The ZX81 is a low-cost home computer developed by Sinclair Research in the early 1980s, notable for popularizing personal computing in the UK before the rise of more advanced systems.
All labels observed (6)
| Label | Occurrences |
|---|---|
| ZX81 canonical | 5 |
| Sinclair ZX81 | 2 |
| Timex Sinclair 1000 | 2 |
| Timex Sinclair 1500 | 2 |
| Sinclair ZX81 industrial design | 1 |
| ZX81 platform | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5601719 — 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: ZX81 Context triple: [ZX Spectrum, predecessor, ZX81]
-
A.
ZX Spectrum
The ZX Spectrum is an 8-bit home computer released by Sinclair Research in 1982, famous for its rubber keyboard, distinctive color graphics, and major role in the rise of home computing and gaming in the UK.
-
B.
Amstrad CPC
The Amstrad CPC is an 8-bit home computer line from the 1980s, popular in Europe for gaming and productivity software.
-
C.
BBC Micro
The BBC Micro was a popular 1980s British home and educational computer, widely used in schools and influential in early personal computing and programming education in the UK.
-
D.
Acorn Electron
The Acorn Electron is a compact 8-bit home computer released in the 1980s as a cost-reduced, consumer-oriented version of Acorn's BBC Micro.
-
E.
Commodore 64
The Commodore 64 is an iconic 8-bit home computer from the 1980s, renowned for its widespread popularity, distinctive sound and graphics capabilities, and extensive library of games and software.
- 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: ZX81 Target entity description: The ZX81 is a low-cost home computer developed by Sinclair Research in the early 1980s, notable for popularizing personal computing in the UK before the rise of more advanced systems.
-
A.
ZX Spectrum
The ZX Spectrum is an 8-bit home computer released by Sinclair Research in 1982, famous for its rubber keyboard, distinctive color graphics, and major role in the rise of home computing and gaming in the UK.
-
B.
Amstrad CPC
The Amstrad CPC is an 8-bit home computer line from the 1980s, popular in Europe for gaming and productivity software.
-
C.
BBC Micro
The BBC Micro was a popular 1980s British home and educational computer, widely used in schools and influential in early personal computing and programming education in the UK.
-
D.
Acorn Electron
The Acorn Electron is a compact 8-bit home computer released in the 1980s as a cost-reduced, consumer-oriented version of Acorn's BBC Micro.
-
E.
Commodore 64
The Commodore 64 is an iconic 8-bit home computer from the 1980s, renowned for its widespread popularity, distinctive sound and graphics capabilities, and extensive library of games and software.
- F. None of above. chosen
Statements (56)
| Predicate | Object |
|---|---|
| instanceOf |
8-bit computer
ⓘ
Sinclair computer ⓘ home computer ⓘ |
| architecture | 8-bit ⓘ |
| bus | edge connector expansion bus ⓘ |
| commercialStatus | discontinued ⓘ |
| companyFounder | Clive Sinclair ⓘ |
| countryOfOrigin | United Kingdom ⓘ |
| cpu |
NEC D780C
ⓘ
linked to:
NEC
Zilog Z80 ⓘ |
| cpuClockSpeed | 3.25 MHz ⓘ |
| designer | Rick Dickinson ⓘ |
| developer | Sinclair Research ⓘ |
| displayDevice | television ⓘ |
| displayOutput | RF modulator ⓘ |
| exportVariant |
Timex Sinclair 1000
ⓘ
linked to:
ZX81
Timex Sinclair 1500 ⓘ
linked to:
ZX81
|
| formFactor | compact wedge-shaped case ⓘ |
| graphicsMode |
semigraphics
ⓘ
text mode ⓘ |
| influenced |
ZX Spectrum
ⓘ
low-cost home computers in early 1980s ⓘ |
| introductoryPrice |
£69.95 kit
ⓘ
£99.95 assembled ⓘ |
| keyboardType | membrane keyboard ⓘ |
| manufacturer |
Sinclair Research
ⓘ
Timex Corporation ⓘ |
| market | home computer market ⓘ |
| massStorageFormat | compact cassette ⓘ |
| maxRamWithExpansion | 16 KB ⓘ |
| notableFor |
low cost
ⓘ
mail-order sales model ⓘ popularizing home computing in the UK ⓘ |
| notablePeripheral |
16 KB RAM pack
ⓘ
disk interfaces (third-party) ⓘ joystick interface ⓘ thermal printer ⓘ |
| operatingSystem |
Sinclair BASIC in ROM
ⓘ
linked to:
Sinclair BASIC
|
| powerSupply | external power supply ⓘ |
| predecessor |
ZX80
ⓘ
linked to:
Sinclair ZX80
|
| primaryLanguage | Sinclair BASIC ⓘ |
| primaryStorage | cassette tape ⓘ |
| ram | 1 KB ⓘ |
| releaseDate | 1981-03-05 ⓘ |
| romContents |
Sinclair BASIC interpreter
ⓘ
linked to:
Sinclair BASIC
operating system ⓘ |
| romSize | 8 KB ⓘ |
| successor | ZX Spectrum ⓘ |
| targetUsers |
educational users
ⓘ
hobbyists ⓘ home users ⓘ |
| textResolution | 32×24 characters ⓘ |
| unitsSold | over 1.5 million units ⓘ |
| videoGenerationMethod | software-generated video ⓘ |
| videoStandard |
NTSC (Timex variants)
ⓘ
linked to:
NTSC color television standard
PAL ⓘ |
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: ZX81 Description of subject: The ZX81 is a low-cost home computer developed by Sinclair Research in the early 1980s, notable for popularizing personal computing in the UK before the rise of more advanced systems.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: ZX81
linked to: ZX81
linked to: ZX81
linked to: ZX81
linked to: ZX81
linked to: ZX81
subject linked to:
Speccy
linked to: ZX81
linked to: ZX81