He handwrote them, and occasionally typed them (especially early on, I gave up trying to find the transition point). It was something he was known for. If you r

He handwrote them, and occasionally typed them (especially early on, I gave up trying to find the transition point). It was something he was known for. If you read the EWD's over the years you'll see the same (or very similar) handwriting throughout, which would not be the case if he had a secretary writing them for him (who wouldn't have been the same person as he moved between countries). https://en.wikipedia.org/wiki/Edsger_W._Dijkstra#EWD_manuscripts https://en.wikipedia.org/wiki/Edsger_W._Dijkstra#EWD_manuscr... https://www.cs.utexas.edu/~EWD/ https://www.cs.utexas.edu/~EWD/ - Pick random ones from different decades and you'll see very similar handwriting. (Didn't read these, picked two at random): 2001 - https://www.cs.utexas.edu/~EWD/ewd13xx/EWD1307.PDF https://www.cs.utexas.edu/~EWD/ewd13xx/EWD1307.PDF 1984 - https://www.cs.utexas.edu/~EWD/ewd09xx/EWD901.PDF https://www.cs.utexas.edu/~EWD/ewd09xx/EWD901.PDF