So I got this page from Mark and my first thought was, "Oh, dear God, in a century people will still be using CHMOD. Kill me."
For those of you who are currently going "huh?" I'll allow the Internet to explain since I am truly atrocious at explanations: chmod 777 is a Unix/Linux/etc. command line instruction that means give full access to this file to everyone.
Those gray dialog box things are the mesh network radio messages, first seen back on page 53.
New Abilene, a planet whose ape-descendant life forms are so amazingly primitive that they still think digital watches are a pretty neat idea.