The Startup
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The Startup

HAL/S, Language of NASA’s Space Shuttle Programs (Part 1)

HAL/S (High-order Assembly Language/Shuttle) is a programming language developed for NASA in the early 1970s by Intermetrics. HAL/S is regarded as one of the then real-time, high-level programming languages for onboard programs of Spaceflights. Almost 85% of the programs used in the Space Shuttle programs were written in HAL/S.

At the time of the emergence of HAL/S, almost every program of onboard spacecraft was written either in assembly languages or in interpreted languages. But the slowness of interpreted languages and the…

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