The Dijkstra-Zonneveld ALGOL 60 compiler for the Electrologica X1

In the summer of 1960 Edsger W. Dijkstra and Jaap A. Zonneveld put into operation the very first ALGOL 60 compiler in the world. Its code was never documented. This report contains the full assembly text of one of the latest versions of that compiler (from 1964). In order to make that text more accessible, an equivalent version in Pascal is added, together with eight chapters introducing the compiler and explaining its major features.