| http://<addr> | - Browse a WWW server. |
| gopher://<addr> | - Browse a gopher server. |
| telnet://<addr> | - Telnet to a remote host. |
| ftp://<addr> | - Connect to an ftp site. |
| mailto:<mail-addr> | - Mail a message to someone. |
| news:<usenet-group> | - Read usenet news. |
| <filename> | - Display the html file. |