"Testing shows the presence, not the absence of bugs"
— Edsger W. Dijkstra

January 1, 1970

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Added on April 10, 2026
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DesignersComputer scientistsInventorsSoftware engineersProgrammers from the Netherlands
Original Language: English

Sources

Dijkstra (1969) J.N. Buxton and B. Randell, eds, Software Engineering Techniques, April 1970. Report on a conference sponsored by the NATO Science Committee, Rome, Italy, 27–31 October 1969. p. 16. Possibly the earliest documented use of the famous quote.