Item Lore

Item Lore is a recurring ability in the Final Fantasy series. It doubles the effectiveness of items.

Final Fantasy III
Although not named, Scholars double the effect of items when used.

Final Fantasy IV
Item Lore is an augment in the DS version.

Final Fantasy XIII
The Doctor's Code accessory give the ability Improved potions.

Final Fantasy Tactics A2
Item Lore is a support ability.