Armor

Armor is a ship component that increases the Hit Points (HP) of the ship it's installed on, by applying a multiplier to the base HP of the ship. It has no effect on ground troops.

Armor is researched through the Chemistry Tech Tree, and there are 5 levels of Armor which can be researched. The level is listed next to the name. Space listed is base. Miniaturization can have a significant impact.

Special Components
Key: P = Production, S = Space

Armor Miniaturization
Researching further in the Chemistry tree decreases cost and space requirements of Armor - as it simultaneously does with all technology from the Chemistry tree such as Torpedo and Bomb weapons. That is, any advance in the Chemistry tree confers space and cost reductions for all components in lower down in the Chemistry tree.

A partial table of the actual reduction factors has been added below.

(Note: the fully completed table in the Weapons article probably applies to all types of Components and all technology trees)