Per Brinch Hansen Dead
Created Concurrent Pascal and the RC 4000's monitor — the foundation of every modern OS's concurrency model.
19251950197520002025
Wrote the RC 4000's kernel (the first OS kernel called that), invented the monitor concept for concurrency, and built Concurrent Pascal.\n\nThe 'Operating System Principles' book (1973) defined the field; his Concurrent Pascal was the first concurrent language.