IBM High Level Assembler

E752542

IBM product assembler mainframe development environment software development tool

IBM High Level Assembler is IBM’s advanced assembly language development environment for mainframe systems, providing powerful macro facilities, optimization features, and tooling support for low-level z/Architecture programming.

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All labels observed (6)

Label	Occurrences
High Level Assembler	2
IBM Assembler XF	1
IBM High Level Assembler canonical	1
IBM High Level Assembler Language Reference	1
IBM High Level Assembler for z/OS & z/VM & z/VSE	1
IBM High Level Assembler manuals	1

How this entity was disambiguated

This entity first appeared as the object of triple T8707058 — 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 High Level Assembler
Context triple: [Assembler, tooling, IBM High Level Assembler]

A. z/Architecture
z/Architecture is IBM's 64-bit mainframe instruction set architecture designed for high-reliability, high-throughput enterprise computing on System z servers.
B. IBM ESA/390 ISA
IBM ESA/390 ISA is a mainframe instruction set architecture that evolved from IBM’s System/370 line, supporting 31-bit addressing and advanced enterprise computing features used in IBM System/390 systems.
C. IBM z/Transaction Processing Facility
IBM z/Transaction Processing Facility is a high-performance, real-time operating system for IBM Z mainframes designed to handle extremely high-volume, mission-critical transaction processing workloads, particularly in industries like airlines, banking, and telecommunications.
D. CICS
CICS is the College of Information and Computer Sciences at the University of Massachusetts Amherst, known for its research and education in computer science and related fields.
E. PL/I
PL/I is a high-level programming language developed by IBM in the 1960s that combines features from scientific, business, and systems programming languages into a single, general-purpose language.
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 High Level Assembler
Target entity description: IBM High Level Assembler is IBM’s advanced assembly language development environment for mainframe systems, providing powerful macro facilities, optimization features, and tooling support for low-level z/Architecture programming.

A. z/Architecture
z/Architecture is IBM's 64-bit mainframe instruction set architecture designed for high-reliability, high-throughput enterprise computing on System z servers.
B. IBM ESA/390 ISA
IBM ESA/390 ISA is a mainframe instruction set architecture that evolved from IBM’s System/370 line, supporting 31-bit addressing and advanced enterprise computing features used in IBM System/390 systems.
C. IBM z/Transaction Processing Facility
IBM z/Transaction Processing Facility is a high-performance, real-time operating system for IBM Z mainframes designed to handle extremely high-volume, mission-critical transaction processing workloads, particularly in industries like airlines, banking, and telecommunications.
D. CICS
CICS is the College of Information and Computer Sciences at the University of Massachusetts Amherst, known for its research and education in computer science and related fields.
E. PL/I
PL/I is a high-level programming language developed by IBM in the 1960s that combines features from scientific, business, and systems programming languages into a single, general-purpose language.
F. None of above. chosen

Statements (49)

Predicate	Object
instanceOf	IBM product ⓘ assembler ⓘ mainframe development environment ⓘ software development tool ⓘ
alsoKnownAs	HLASM ⓘ High Level Assembler ⓘ linked to: IBM High Level Assembler IBM High Level Assembler for z/OS & z/VM & z/VSE ⓘ linked to: IBM High Level Assembler
backwardCompatibility	System/370 assembler source compatibility ⓘ System/390 assembler source compatibility ⓘ
developer	IBM ⓘ
distribution	bundled with IBM mainframe software offerings ⓘ
documentation	IBM High Level Assembler Language Reference ⓘ linked to: IBM High Level Assembler IBM High Level Assembler Programmer’s Guide ⓘ linked to: HLASM
integratesWith	IBM Debug Tool for z/OS ⓘ IBM Developer for z/OS ⓘ linked to: IBM z/OS development tools IBM z/OS development tools ⓘ
languageFamily	IBM System/360 assembly language ⓘ
licenseModel	proprietary ⓘ
predecessor	IBM Assembler H ⓘ linked to: HLASM IBM Assembler XF ⓘ linked to: IBM High Level Assembler
primaryUsers	assembler programmers ⓘ performance engineers ⓘ system programmers ⓘ
providesFeature	conditional assembly ⓘ cross-reference reports ⓘ debugging support ⓘ diagnostic messages ⓘ language extensions for z/Architecture instructions ⓘ listing generation ⓘ optimization features ⓘ powerful macro facilities ⓘ structured macro processing ⓘ
supportsArchitecture	System/390 ⓘ linked to: IBM System/390 z/Architecture ⓘ
supportsDataEncoding	EBCDIC ⓘ
supportsInstructionSet	z/Architecture instruction set ⓘ linked to: z/Architecture
supportsProgrammingModel	low-level z/Architecture programming ⓘ multithreaded environments ⓘ reentrant code ⓘ
targetOperatingSystem	z/OS ⓘ z/VM ⓘ z/VSE ⓘ
targetPlatform	IBM Z mainframes ⓘ linked to: IBM mainframe IBM z/Architecture ⓘ linked to: z/Architecture
useCase	exploitation of new IBM Z hardware instructions ⓘ middleware and subsystem development ⓘ operating system components development ⓘ performance-critical application components ⓘ system programming on IBM mainframes ⓘ

How these facts were elicited