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+=== Updating ITS' host table ===
+ITS was used mostly in the era before DNS, when a hosts.txt file was regularly distributed to all Arpanet hosts.  If you want to add a new host and its IP number, you have to update ITS' host table.
+ITS' human readable host table is in the file ''SYSHST; H3TEXT >''.  You update it with a regular text editor.  To add a new host, enter a line like ''HOST : A.B.C.D : NAME : MACHINE : OS : :''.  A.B.C.D is the IP number, and NAME is the hostname.  MACHINE and OS are free text descriptions.
+Having done this, you have to update the binary host table ''SYSBIN; HOSTS3 >'' which is what programs actually use to look up host names.  To update this from the text file, just run '':SYSHST;H3MAKE''.