| |-- radiant: old and irrelevant
| |-- rtfm: contains an index.html identical to rtfm.html below
| `-- sipb: the document root for sipb.mit.edu
| |-- radiant: old and irrelevant
| |-- rtfm: contains an index.html identical to rtfm.html below
| `-- sipb: the document root for sipb.mit.edu