I began my academic research career in 1968, when I moved from industrial employment as a programmer to the Chair of Computing at the Queens University in Belfast. My chosen research goal was to discover an axiomatic basis for computer programming. Originally I wanted to express the axioms as algebraic equations, like those which provide the basis of arithmetic or group theory. But I did not know how. After many intellectual vicissitudes, I have now discovered the simple secret. I would be proud of this discovery, if I were not equally ashamed at taking so long to discover it.
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