Canonical Types
0   Text File
1   Gopher submenu or link to another gopher server
2   CCSO Nameserver
3   Error code returned by a Gopher server to indicate failure
4   BinHex-encoded file (primarily for Macintosh computers)
5   DOS file
6   uuencoded file
7   Gopher full-text search
8   Telnet
9   Binary file
+   Mirror or alternate server (for load balancing or in case of primary server downtime)
g   GIF file
I   Image file
T   Telnet 3270
Non-Canonical Types
h   HTML file
i   Informational message
s   Sound file
d   Document file