z/OS

E41049

IBM mainframe operating system operating system

z/OS is IBM’s 64-bit mainframe operating system designed for high-volume, secure, and reliable enterprise computing workloads.

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All labels observed (9)

Label	Occurrences
z/OS canonical	64
IBM z/OS	25
z/OS operating system	7
z/OS UNIX System Services	3
z/OS operating system environment	2
C on z/OS	1
IBM z/OS Security	1
TSO/E	1
z/OS (in compatibility mode)	1

How this entity was disambiguated

This entity first appeared as the object of triple T307552 — 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/OS
Context triple: [IBM WebSphere, runsOn, z/OS]

A. OS/360
OS/360 is IBM's landmark mainframe operating system introduced in the 1960s for the System/360 family, known for pioneering modern concepts in batch processing, multiprogramming, and system software design.
B. IBM i
IBM i is IBM’s integrated operating system for its Power Systems servers, known for its built-in database, high reliability, and strong support for enterprise applications.
C. 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.
D. AIX
AIX is IBM’s proprietary Unix operating system designed for enterprise servers and high-reliability, scalable computing environments.
E. 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.
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/OS
Target entity description: z/OS is IBM’s 64-bit mainframe operating system designed for high-volume, secure, and reliable enterprise computing workloads.

A. OS/360
OS/360 is IBM's landmark mainframe operating system introduced in the 1960s for the System/360 family, known for pioneering modern concepts in batch processing, multiprogramming, and system software design.
B. IBM i
IBM i is IBM’s integrated operating system for its Power Systems servers, known for its built-in database, high reliability, and strong support for enterprise applications.
C. 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.
D. AIX
AIX is IBM’s proprietary Unix operating system designed for enterprise servers and high-reliability, scalable computing environments.
E. 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.
F. None of above. chosen

Statements (78)

Predicate	Object
instanceOf	IBM mainframe operating system ⓘ operating system ⓘ
architecture	64-bit ⓘ
designedFor	high-volume workloads ⓘ reliable workloads ⓘ secure workloads ⓘ
developer	IBM ⓘ
family	MVS ⓘ
feature	capacity on demand ⓘ encryption at rest ⓘ encryption in transit ⓘ fault tolerance ⓘ hardware cryptography integration ⓘ high availability ⓘ scalability ⓘ security ⓘ workload isolation ⓘ
includes	JES2 ⓘ JES3 ⓘ Resource Measurement Facility ⓘ System Management Facilities ⓘ Workload Manager ⓘ linked to: IBM Tivoli management software z/OS Communications Server ⓘ z/OS Management Facility ⓘ z/OS UNIX System Services ⓘ linked to: z/OS
introduced	early 2000s ⓘ
licenseModel	proprietary ⓘ
platform	IBM Z ⓘ linked to: IBM System z System z ⓘ linked to: IBM System z zSeries ⓘ linked to: IBM System z
predecessor	OS/390 ⓘ
replaced	OS/390 ⓘ
runsOn	IBM Z processors ⓘ linked to: z/Architecture IBM mainframes ⓘ linked to: IBM System z
securityComponent	RACF ⓘ
supports	Assembler ⓘ C ⓘ C++ ⓘ CICS Transaction Server ⓘ COBOL ⓘ Db2 for z/OS ⓘ linked to: IBM DB2 IMS ⓘ JES2 ⓘ JES3 ⓘ Java ⓘ MQ for z/OS ⓘ linked to: IBM MQ PL/I ⓘ POSIX-compliant UNIX environment ⓘ Parallel Sysplex ⓘ linked to: Sysplex RACF ⓘ RMF ⓘ Rexx ⓘ linked to: PL/I SMF ⓘ Sysplex ⓘ TCP/IP networking ⓘ VTAM networking ⓘ WLM ⓘ batch processing ⓘ high-volume transaction processing ⓘ online transaction processing ⓘ virtualization ⓘ workload management ⓘ z/OS Communications Server ⓘ z/OS Management Facility ⓘ z/OS UNIX System Services ⓘ linked to: z/OS z/OSMF web-based management ⓘ
supportsStandard	IPSec ⓘ IPv4 ⓘ IPv6 ⓘ POSIX ⓘ TCP/IP ⓘ TLS ⓘ
targetUse	enterprise computing ⓘ financial services workloads ⓘ government workloads ⓘ large-scale transaction systems ⓘ mission-critical workloads ⓘ
vendor	IBM ⓘ

How these facts were elicited

Referenced by (105)

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

IBM WebSphere → runsOn → z/OS ⓘ

Lotus Domino → supportsOperatingSystem → z/OS ⓘ

IBM Db2 → operatingSystem → z/OS ⓘ

subject linked to: IBM DB2

IBM System z → operatingSystem → z/OS ⓘ

OS/360 → influenced → z/OS ⓘ

z/OS → supports → z/OS UNIX System Services ⓘ

linked to: z/OS

z/OS → includes → z/OS UNIX System Services ⓘ

linked to: z/OS

IBM MQ → supportsPlatform → z/OS ⓘ

IBM SDK for Java → targetPlatform → IBM z/OS ⓘ

linked to: z/OS

PL/I → platform → z/OS ⓘ

Notes Storage Facility → supportsPlatform → z/OS ⓘ

IBM Connections → operatingSystem → z/OS ⓘ

IBM VisualAge family → operatingSystem → z/OS ⓘ

z/TPF → relatedTo → IBM z/OS ⓘ

linked to: z/OS

OSA-Express networking → supportsEnvironment → z/OS ⓘ

z/Architecture → supports → z/OS ⓘ

MVS → successor → z/OS ⓘ

OS/390 → successor → z/OS ⓘ

OS/390 → supportsSubsystem → TSO/E ⓘ

linked to: z/OS

Job Control Language → usedOnPlatform → IBM z/OS ⓘ

linked to: z/OS

Job Control Language → relatedTo → z/OS UNIX System Services ⓘ

linked to: z/OS

JES2 → runsOn → z/OS ⓘ

Sysplex → designedFor → z/OS ⓘ

Sysplex → supportsOperatingSystem → z/OS ⓘ

RACF → platform → IBM z/OS ⓘ

linked to: z/OS

RACF → belongsToProductFamily → IBM z/OS Security ⓘ

linked to: z/OS

SMF → runsOn → z/OS ⓘ

RMF → operatingSystem → z/OS ⓘ

WLM → runsOn → z/OS ⓘ

WLM → operatingSystemFamily → IBM z/OS ⓘ

linked to: z/OS

z/OS Communications Server → partOf → z/OS ⓘ

z/OS Communications Server → operatingSystem → z/OS ⓘ

z/OS Management Facility → runsOn → z/OS ⓘ

z/OS Management Facility → componentOf → z/OS operating system ⓘ

linked to: z/OS

Assembler → usedOn → IBM z/OS ⓘ

linked to: z/OS

Assembler → integratesWith → C on z/OS ⓘ

linked to: z/OS

IMS → runsOn → z/OS ⓘ

System Management Facilities → runsOn → z/OS ⓘ

Resource Measurement Facility → operatingSystem → z/OS ⓘ

Resource Measurement Facility → componentOf → z/OS operating system ⓘ

linked to: z/OS

MQI → runsOn → IBM z/OS ⓘ

linked to: z/OS

JES3 → runsOn → IBM z/OS ⓘ

linked to: z/OS

JES3 → partOf → z/OS operating system environment ⓘ

linked to: z/OS

CICS Transaction Server → operatingSystem → z/OS ⓘ

OS/VS2 → successor → z/OS ⓘ

IBM MQ → supportsPlatform → IBM z/OS ⓘ

subject linked to: MQ

linked to: z/OS

IBM Integration Bus → runsOn → z/OS ⓘ

FICON → supportsEnvironment → z/OS ⓘ

Domino server → supportsPlatform → z/OS ⓘ

ESA/390 → supportsOperatingSystem → z/OS (in compatibility mode) ⓘ

linked to: z/OS

All labels observed (9)

How this entity was disambiguated Show

Statements (78)

How these facts were elicited Show

Referenced by (105)

How this entity was disambiguated

How these facts were elicited