Thanks, this does look interesting! I find any old ITS-related technical discussions like this (despite it being ostensibly OS-neutral standards language) to be

Thanks, this does look interesting! I find any old ITS-related technical discussions like this (despite it being ostensibly OS-neutral standards language) to be very difficult to pore over. Sometimes I wonder if I'm computer-literate or just Unix-literate! Maybe one of these days I will get ITS running in an emulator and see what I've been missing.