z/Architecture

E197887

IBM architecture instruction set architecture mainframe architecture

z/Architecture is IBM's 64-bit mainframe instruction set architecture designed for high-reliability, high-throughput enterprise computing on System z servers.

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All labels observed (5)

Label	Occurrences
IBM Z architecture	3
z/Architecture canonical	3
IBM System z architecture	1
IBM Z processors	1
IBM z/Architecture	1

How this entity was disambiguated

This entity first appeared as the object of triple T1718034 — 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: z/Architecture
Context triple: [IBM System z, architecture, z/Architecture]

A. IBM System z
IBM System z is IBM’s family of mainframe computers known for high reliability, scalability, and support for enterprise workloads, including running Linux at large scale.
B. IBM System/390
IBM System/390 is IBM’s family of 1990s mainframe computers that introduced 31-bit ESA/390 architecture and advanced enterprise computing features, forming the basis for later System z systems.
C. z/OS
z/OS is IBM’s 64-bit mainframe operating system designed for high-volume, secure, and reliable enterprise computing workloads.
D. IBM System/370
IBM System/370 is a family of IBM mainframe computers introduced in the 1970s that extended and modernized the System/360 architecture while maintaining backward compatibility.
E. IBM System/360
IBM System/360 is a landmark family of mainframe computers introduced in the 1960s that standardized computer architecture and revolutionized business and scientific computing.
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: z/Architecture
Target entity description: z/Architecture is IBM's 64-bit mainframe instruction set architecture designed for high-reliability, high-throughput enterprise computing on System z servers.

A. IBM System z
IBM System z is IBM’s family of mainframe computers known for high reliability, scalability, and support for enterprise workloads, including running Linux at large scale.
B. IBM System/390
IBM System/390 is IBM’s family of 1990s mainframe computers that introduced 31-bit ESA/390 architecture and advanced enterprise computing features, forming the basis for later System z systems.
C. z/OS
z/OS is IBM’s 64-bit mainframe operating system designed for high-volume, secure, and reliable enterprise computing workloads.
D. IBM System/370
IBM System/370 is a family of IBM mainframe computers introduced in the 1970s that extended and modernized the System/360 architecture while maintaining backward compatibility.
E. IBM System/360
IBM System/360 is a landmark family of mainframe computers introduced in the 1960s that standardized computer architecture and revolutionized business and scientific computing.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	IBM architecture ⓘ instruction set architecture ⓘ mainframe architecture ⓘ
bitWidth	64-bit ⓘ
compatibleWith	ESA/390 architecture (for many instructions and facilities) ⓘ IBM System/360 ⓘ surface form: System/360 architecture (at the binary interface level for many instructions) IBM System/370 ⓘ surface form: System/370 architecture (at the binary interface level for many instructions)
designedFor	IBM System z ⓘ IBM System z ⓘ surface form: IBM Z enterprise computing ⓘ mainframe computers ⓘ
developer	IBM ⓘ
feature	64-bit general-purpose registers ⓘ 64-bit instruction addressing ⓘ 64-bit virtual addressing ⓘ backward compatibility ⓘ hardware cryptography support ⓘ high reliability ⓘ high throughput ⓘ virtualization support ⓘ
firstImplementedIn	IBM System z ⓘ surface form: IBM z900
hasRegisterType	access registers ⓘ control registers ⓘ floating-point registers ⓘ general-purpose registers ⓘ vector registers ⓘ
introducedBy	IBM System z ⓘ surface form: IBM zSeries mainframes
predecessor	ESA/390 ⓘ
supports	Linux on S/390 ⓘ surface form: Linux on IBM Z z/OS ⓘ z/VM ⓘ z/VSE ⓘ
supportsFeature	ECC memory protection ⓘ PR/SM hypervisor ⓘ RAS features (reliability, availability, serviceability) ⓘ Simultaneous multithreading (SMT) on some implementations ⓘ channel I/O subsystem ⓘ hardware transactional memory (on later generations) ⓘ logical partitioning (LPAR) ⓘ
supportsMode	24-bit addressing mode ⓘ 31-bit addressing mode ⓘ 64-bit mode ⓘ
supportsWorkload	batch processing ⓘ large-scale database workloads ⓘ mission-critical applications ⓘ online transaction processing (OLTP) ⓘ
usedIn	financial services data centers ⓘ government data centers ⓘ large enterprise transaction processing ⓘ

How these facts were elicited

Referenced by (9)

Full triples — surface form annotated when it differs from this entity's canonical label.

IBM System z → architecture → z/Architecture ⓘ

z/OS → runsOn → z/Architecture ⓘ

this entity surface form: IBM Z processors

IBM System/390 → formsBasisFor → z/Architecture ⓘ

this entity surface form: IBM System z architecture

z/VM → supportsArchitecture → z/Architecture ⓘ

this entity surface form: IBM Z architecture

z/VM → supportsArchitecture → z/Architecture ⓘ

z/VSE → architecture → z/Architecture ⓘ

this entity surface form: IBM Z architecture

z/VSE → architecture → z/Architecture ⓘ

Assembler → usedOn → z/Architecture ⓘ

this entity surface form: IBM z/Architecture

Red Hat CoreOS → supports → z/Architecture ⓘ

this entity surface form: IBM Z architecture

All labels observed (5)

How this entity was disambiguated Show

Statements (49)

How these facts were elicited Show

Referenced by (9)

How this entity was disambiguated

How these facts were elicited