Signs on the Sand

Like most of us, Dijkstra always believed it a scientist's duty to maintain a lively correspondence with his scientific colleagues. To a greater extent than most of us, he put that conviction into practice. For over four decades, he mailed copies of his consecutively numbered technical notes, trip reports, insightful observations, and pungent commentaries, known collectively as "EWDs", to several dozen recipients in academia and industry. Thanks to the ubiquity of the photocopier and the wide interest in Dijkstra's writings, the informal circulation of many of the EWDs eventually reached into the thousands.
Although most of Dijkstra's publications began life as EWD manuscripts, the great majority of his manuscripts remain unpublished. They have been inaccessible to many potential readers, and those who have received copies have been unable to cite them in their own work. To alleviate both of these problems, the department has collected over a thousand of the manuscripts in this permanent web site, in the form of PDF bitmap documents (to read them, you'll need a copy of Acrobat Reader). We hope you will find it convenient, useful, inspiring, and enjoyable.

The manuscripts of Edsger W. Dijkstra. Really fascinating collection.

[Found in Michael Brundage's XQuery book].