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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.
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.