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High-Level Assembler

What Does High-Level Assembler Mean?

High-level assembler (HLASM) is an assembler programming language developed by IBM and released in June 1992. HLASM mainly works within IBM-based operating systems.


At the time HLASM was IBM’s first new assembler language since 1972.

Techopedia Explains High-Level Assembler

HSLAM shares characteristics common to other assembler programs. For example, it translates any basic computer instruction into binary code – the final form of code that can be processed by a computer.

HSLAM had many enhancements over IBM’s older assembler programs such as DOS/VSE and VSE/AF. For example, HLASM included support for older applications, common task automation and cross-referencing, allowing for more efficient development and administration. HLASM also improved debugging power, providing greater code-finding efficiency.


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