E: Putting a New Tool on the Web
--------------------------------------------------------
train-times works well from the Unix prompt but most people use the web.
How do we allow a user to specify the arguments to this script and get
the results?

Answer: Web form and back-end connector

        web form: train-times.html
       connector: train-times.cgi

The idea:       browser
          o    +------+
         -|-   | form |--+
         / \   +------+  |
                         | -request-->
         ----------------+------------+------------------  Internet
                           <-reply--- |
                               +------+----------+
                          +--- |                 | The Unix machine
                       ___|__  |                 |
                disk  / form \ |   [connector]   |
                      | data | |       |         |
                      \______/ |   train-times   |
                               |       |         |
                               |  grep, cut, ... |
                               +-----------------+

Remarks: The system works, but the report format  is  crude.
We need to process the output to make it look nicer.  There-
fore we need to find or write some tools to manage the	out-
put format.