Send an e-mail message to listproc@usc.edu.  You do not need to enter 
anything in the subject line.  In the body of the message, say Subscribe 
hash-l Paul Flying Booger Woodford (use your own name, dummy).

You will receive an automated message from listproc@usc.edu, welcoming 
you to the hash list (hash-l), and describing some subscriber options.

This should normally be the last message you'll receive from 
listproc@usc.edu.  From this point on, you will receive all messages 
posted to hash-l@usc.edu, and you can post your own messages to same.  
To post, just send mail to hash-l@usc.edu.  Please do use the subject line 
on messages to hash-l!

You may get as many as 50 hash-l messages daily.  If the high volume of 
messages posted to hash-l is too much for you, you can switch to digest 
mode.  In digest mode, you'll get one long message daily containing 
all the individual posts to hash-l.  To switch to digest mode, send a 
message to listproc@usc.edu.  Once again, you do not need to enter 
anything in the subject line.  In the body of the message, say 
set hash-l mail digest.

Here are a couple of other useful subscriber commands (remember, 
subscriber command messages go to listproc@usc.edu, not 
hash-l@usc.edu:

- To find out who is currently subscribed to hash-l: review hash-l.

- To unsubscribe: unsubscribe hash-l.

- To switch back from digest mode to normal mode: set hash-l mail.

Have fun!