There are 30 pieces of Intel in the Call of Duty 4: Modern Warfare single-player game. If you can find them it allows you to unlock new cheats for the single-player game after completing it once. They appear in the game world as laptops; to pick them up, you simply need to find the laptop and pick it up. Don’t worry if you miss a piece of intel, you can try to find it again if you just replay the level it’s on.
Here is a video that shows you the exact locations of the Intel in COD4.
