Agility

Agility is part of the main stats, also called SPECIAL-Co values.

In these rules it's usually abbreviated with a single "A".

Agility contains the whole motor activity of your character. Influences, among other things, the skills sneaking, lock picking, pick pocketing, the ability to to live of the land, the ability to use non-electronic gadgets and also the amount of available action points in combat.
Agility is therefore the most important stat.