A full attack is full-round action that allows you to attack twice at no penalty.

There are no iterative attacks for having a higher base attack bonus (BAB).

Normally, making an weapon attack or combat maneuver is a single action but you take a cumulative -5 penalty for making more than one during the same turn (similar to iterative attacks).

Two-Weapon Fighting, Multi-attack, and Flurry of Blows and their improved versions are replaced by the Flurry feat.