Overall Design
                         ==============



```
    +---------+        +--------+       +--------+           +---------+
    |         |        |  web   |       |        |   FIFO    |  data   |
    | browser |<------>| server |<----->|  CGI   |<--------->| server  |
    |         |  HTTP  |        |  CGI  |program |name=value |         |
    +---------+        +--------+       +--------+           +---------+
                                            ^                     ^
                                            |                     |
                                            |                     |
                                        +---------+         +-----------+
                                        |  HTML   |         |           |
                                        |templates|         |flat files |
                                        |         |         |           |
                                        +---------+         +-----------+
```