ONA: (
Type) ONA = Original Net Animation. These are the anime titles released over the Internet (often for promoting an anime series, sometimes even for promoting a computer game).
Modern: (
Setting) These are titles which have a modern feel to them; the story takes place in the present day (of the creation of this anime), give or take a few years.
Fighting: (
Story/Location) Series whose primary focus is fighting would fit into this segment. (More precise) Subgenres include "
Gun-Action", "
Martial Arts" and "
Swordplay".
