Peter Naur Dead
Edited the ALGOL 60 report and gave BNF its definitive form — the grammar notation every language spec still uses.
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Edited the ALGOL 60 report and put BNF in the language definition — the first formal grammar used to specify a language.\n\nTuring Award 2005; later argued programming is 'theory building' — an essay that still shapes how the field thinks about code.