IPtables - What TABLES are in there?

I was reading on the internet about IPtables and came accross the "-t" flag. Wondering what it was i was forwarded to the TABLES used within IPTABLES. Here is te exceprt from it and the link to the actual plage.

Linuxtopia - Linux Packet Filtering and iptables - Tables:
Linux Packet Filtering and iptables
Chapter 9. How a rule is built - Tables

The -t option specifies which table to use. Per default, the filter table is used. We may specify one of the following tables with the -t option. Do note that this is an extremely brief summary of some of the contents of the Traversing of tables and chains chapter.