IBM 3274 control unit

E699607

IBM 3270 family device mainframe control unit

The IBM 3274 control unit is a mainframe peripheral device that manages and multiplexes multiple IBM 3270-family terminals and printers, handling their communication with the host computer.

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All labels observed (6)

Label	Occurrences
IBM 3274 control unit canonical	2
IBM 3179-G graphics display	1
IBM 3270 terminals	1
IBM 3277 display station	1
IBM 3278 display station	1
IBM 3279 color display station	1

How this entity was disambiguated

This entity first appeared as the object of triple T7935848 — 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: IBM 3274 control unit
Context triple: [IBM 3270-style terminal displays, connectsVia, IBM 3274 control unit]

A. IBM 3081
The IBM 3081 was a high-performance mainframe computer introduced in the early 1980s as part of IBM’s next generation of System/370-compatible processors, known for significantly advancing processing speed and system throughput in enterprise computing.
B. IBM 3083
The IBM 3083 is a mainframe computer model in IBM’s 308X family, introduced in the early 1980s as a more powerful and efficient successor to earlier System/370 processors.
C. IBM 3090
The IBM 3090 was a high-end mainframe computer family introduced in the 1980s, known for its advanced performance, vector processing capabilities, and use in large-scale commercial and scientific computing.
D. IBM 5151
The IBM 5151 is a monochrome CRT computer monitor introduced in the early 1980s for use with the original IBM Personal Computer.
E. IBM 5160
IBM 5160 is IBM’s second-generation personal computer model, commonly known as the IBM PC XT, which introduced a built-in hard drive and expanded capabilities over the original IBM PC.
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: IBM 3274 control unit
Target entity description: The IBM 3274 control unit is a mainframe peripheral device that manages and multiplexes multiple IBM 3270-family terminals and printers, handling their communication with the host computer.

A. IBM 3081
The IBM 3081 was a high-performance mainframe computer introduced in the early 1980s as part of IBM’s next generation of System/370-compatible processors, known for significantly advancing processing speed and system throughput in enterprise computing.
B. IBM 3083
The IBM 3083 is a mainframe computer model in IBM’s 308X family, introduced in the early 1980s as a more powerful and efficient successor to earlier System/370 processors.
C. IBM 3090
The IBM 3090 was a high-end mainframe computer family introduced in the 1980s, known for its advanced performance, vector processing capabilities, and use in large-scale commercial and scientific computing.
D. IBM 5151
The IBM 5151 is a monochrome CRT computer monitor introduced in the early 1980s for use with the original IBM Personal Computer.
E. IBM 5160
IBM 5160 is IBM’s second-generation personal computer model, commonly known as the IBM PC XT, which introduced a built-in hard drive and expanded capabilities over the original IBM PC.
F. None of above. chosen

Statements (48)

Predicate	Object
instanceOf	IBM 3270 family device ⓘ mainframe control unit ⓘ
category	computer terminal controller ⓘ mainframe peripheral ⓘ
compatibleWith	IBM 303x series ⓘ linked to: IBM 3033 IBM 308x series ⓘ linked to: IBM 3083 IBM 3090 ⓘ IBM System/370 ⓘ
connectsTo	IBM 3268 printer ⓘ linked to: IBM 3287 printer IBM 3278 display terminal ⓘ linked to: IBM 3271 control unit IBM 3279 color display terminal ⓘ IBM 3287 printer ⓘ
connectsVia	channel-attached interface ⓘ cluster controller link ⓘ
dataFlow	control-unit-to-host ⓘ control-unit-to-terminal ⓘ host-to-control-unit ⓘ terminal-to-control-unit ⓘ
designedFor	IBM mainframe computers ⓘ linked to: IBM mainframe
function	handles communication with host computer ⓘ manages IBM 3270-family printers ⓘ manages multiple IBM 3270-family terminals ⓘ multiplexes terminal I/O ⓘ
hasFeature	buffering of terminal data ⓘ local editing of screen data ⓘ screen formatting support ⓘ support for multiple logical terminals ⓘ support for printers in the same cluster ⓘ
introducedBy	IBM ⓘ
manufacturer	IBM ⓘ
marketedAs	3270 control unit ⓘ
partOf	IBM 3270 information display system ⓘ linked to: IBM 3270-style terminal displays
predecessor	IBM 3271 control unit ⓘ
role	intermediary between terminals and host ⓘ offloads terminal management from host CPU ⓘ
successor	IBM 3174 Establishment Controller ⓘ linked to: IBM 3174 establishment controller
supportsProtocol	IBM 3270 data stream ⓘ
supportsTopology	clustered terminals ⓘ remote terminal configurations ⓘ
technology	block-mode terminal handling ⓘ synchronous communication ⓘ
usedIn	banking terminal networks ⓘ insurance and financial services terminals ⓘ mainframe data entry environments ⓘ online transaction processing systems ⓘ time-sharing systems ⓘ
usedWith	IBM 4300 series mainframes ⓘ linked to: IBM System/370 IBM 4381 ⓘ

How these facts were elicited