[Jake]

Aah, ok. I think on the Ark, you find the first one in the first hallway you see (in the door, to the left). The second one is when you open the gravity beam bridge for the marines (right behind the controls). Third one is in the building after you destroy the scarab. Just work your way through the building until you get to a small room with sleeping grunts. Then, go down the hallway, and turn to the left, you'll see a secret room. The last terminal is in there.