ICL 1900 mainframe computers
E457333
ICL 1900 mainframe computers were a family of British business and scientific mainframes from International Computers Limited widely used in the 1960s and 1970s.
All labels observed (2)
| Label | Occurrences |
|---|---|
| ICL 1900 mainframe computers canonical | 1 |
| ICT 1950 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4654760 — 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: ICL 1900 mainframe computers Context triple: [Algol 68R, targetPlatform, ICL 1900 mainframe computers]
-
A.
IBM 650
The IBM 650 was an early, widely used mid-1950s drum-based decimal computer that helped popularize electronic data processing in business and education.
-
B.
ICL 2903 minicomputer
The ICL 2903 minicomputer is a small, general-purpose computer system developed by International Computers Limited in the 1970s for business and data processing applications.
-
C.
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.
-
D.
IBM 604
The IBM 604 was an early electromechanical electronic calculating punch introduced in the late 1940s, notable for being one of IBM’s first mass-produced programmable calculators used widely in business and scientific data processing.
-
E.
UNIVAC I
UNIVAC I was one of the earliest commercial electronic computers, pioneering large-scale data processing for government and business in the early 1950s.
- 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: ICL 1900 mainframe computers Target entity description: ICL 1900 mainframe computers were a family of British business and scientific mainframes from International Computers Limited widely used in the 1960s and 1970s.
-
A.
IBM 650
The IBM 650 was an early, widely used mid-1950s drum-based decimal computer that helped popularize electronic data processing in business and education.
-
B.
ICL 2903 minicomputer
The ICL 2903 minicomputer is a small, general-purpose computer system developed by International Computers Limited in the 1970s for business and data processing applications.
-
C.
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.
-
D.
IBM 604
The IBM 604 was an early electromechanical electronic calculating punch introduced in the late 1940s, notable for being one of IBM’s first mass-produced programmable calculators used widely in business and scientific data processing.
-
E.
UNIVAC I
UNIVAC I was one of the earliest commercial electronic computers, pioneering large-scale data processing for government and business in the early 1950s.
- F. None of above. chosen
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
computer architecture
ⓘ
mainframe computer family ⓘ |
| addressingMode | 24-bit addressing ⓘ |
| alsoKnownAs |
1900 series
ⓘ
ICL 1900 series ⓘ |
| architectureType | 24-bit architecture ⓘ |
| characterEncoding | 6-bit character set ⓘ |
| compatibleWith | ICT 1900 series software ⓘ |
| continuedBy | International Computers Limited ⓘ |
| countryOfOrigin | United Kingdom ⓘ |
| inception | 1964 ⓘ |
| inputOutput |
line printers
ⓘ
magnetic disk drives ⓘ magnetic tape drives ⓘ punched card readers ⓘ |
| instructionSetType | single-address instruction set ⓘ |
| introducedBy | International Computers and Tabulators ⓘ |
| manufacturer | International Computers Limited ⓘ |
| market |
commercial data processing
ⓘ
scientific and engineering users ⓘ |
| notableModel |
ICL 1901
ⓘ
ICL 1902 ⓘ ICL 1903 ⓘ ICL 1904 ⓘ
linked to:
ICL 1904A
ICL 1904A ⓘ ICL 1905 ⓘ
linked to:
ICL 1905E
ICL 1905E ⓘ ICL 1906 ⓘ
linked to:
ICL 1906A
ICL 1906A ⓘ ICL 1907 ⓘ
linked to:
ICL 1900 series
ICL 1909 ⓘ |
| notableUser |
British government departments
ⓘ
UK universities ⓘ |
| numberRepresentation |
binary fixed-point
ⓘ
binary floating-point ⓘ |
| operatingSystem |
E4BM
ⓘ
Executive (ICL 1900) ⓘ GEORGE 2 ⓘ GEORGE 3 ⓘ GEORGE 4 ⓘ |
| predecessor |
ICT 1300 series
ⓘ
linked to:
ICT 1301
ICT 1500 series ⓘ |
| primaryUse |
business data processing
ⓘ
scientific computing ⓘ |
| programmingLanguage |
ALGOL
ⓘ
COBOL ⓘ FORTRAN ⓘ
linked to:
Fortran
PLAN (ICL 1900 assembly language) ⓘ |
| successor |
ICL 2900 Series
ⓘ
linked to:
ICL 2900 series
|
| usedInPeriod |
1960s
ⓘ
1970s ⓘ |
| wordLength | 24 bits ⓘ |
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: ICL 1900 mainframe computers Description of subject: ICL 1900 mainframe computers were a family of British business and scientific mainframes from International Computers Limited widely used in the 1960s and 1970s.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: ICL 1900 mainframe computers