IBM® High Level Assembler and Toolkit Feature is a flexible development solution for all Assembler Language applications.

Improve programmer productivity and simplify program development and maintenance with this assembler and optional toolkit.


Key features include:


IBM High Level Assembler and Toolkit Feature provides numerous technology and business benefits:

System requirements

High Level Assembler (HLASM) and Toolkit Feature runs on MVS/ESA, OS/390, VM/ESA and VSE/ESA.


Operating SystemSoftwareHardware
VM/ESA IBM VM Serviceability Enhancements Staged/Extended (VMSES/E) and VMFPLC2

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