Hal definitions

affix
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(1) An interface between hardware and software. See hardware abstraction layer.
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A diminutive of the male given names Henry, Harold and Harry.
pronoun
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(idiomatic, fiction, computing) A homicidal computer, an artificial intelligence that acts similarly to the HAL 9000 featured in 2001: A Space Odyssey.
pronoun
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Origin of hal

From the fictional HAL 9000