1      Pathnames are the names that indicate where certain information is stored
2 in the computer.  In Multics, information is stored in "segments," and
3 segments are stored in "directories," like folders filed in a file drawer.
4 Many "commands" are designed to act on segments, so you must tell the command
5 where to find the segment you want it to act on.  This is done by giving the
6 command a "pathname" "argument."