| Name | Size | Description |
|---|---|---|
| tag | 0 | tag |
| tel | 0 | telephone |
| telnet | 0 | Reference to interactive sessions |
| tftp | 0 | Trivial File Transfer Protocol |
| 0 | multipart/related relative reference resolution | |
| tip | 0 | Transaction Internet Protocol |
| tv | 0 | TV Broadcasts |
| urn | 11 | Uniform Resource Name |
| vemmi | 0 | versatile multimedia interface |
| xmlrpc.beep | 0 | xmlrpc.beep |
