SORO = Special Operations Research Office I believe it was originally found in this publication: https://www.semanticscholar.org/paper/Human-Factors-Considerat

SORO = Special Operations Research Office I believe it was originally found in this publication: https://www.semanticscholar.org/paper/Human-Factors-Considerations-of-Undergrounds-in-Molnar-Tinker/a101ea74d4d08537c1586605af72eea2d9bf2d3a https://www.semanticscholar.org/paper/Human-Factors-Consider... which you can read here: https://books.google.com/books?printsec=frontcover&vid=LCCN66062974#v=onepage&q&f=false https://books.google.com/books?printsec=frontcover&vid=LCCN6...