Wolverines! - Intel Item #1
The gas station is the first business you’ll encounter in this shopping area. Simply go inside and stand behind the checkout counter. The laptop is right in front of you.
Wolverines! - Intel Item #2
At some point, you’ll be ordered to clear the Burger Town of enemies. To the left of that fast food joint is a small fenced trash enclosure with a dumpster. The laptop is inside that dumpster.
Wolverines! - Intel Item #3
Find the Taco Bell lookalike. Head inside. The laptop is on a table near the front entrance.
Wolverines! - Intel Item #4
Find the bank. Head inside. The laptop is in one of the cubicles near the door.
The mission starts, you climb a hill and engage in a huge firefight with men on roofs and men shooting from white trucks. Immediately afterwards, you'll walk past the red garage door below. Head inside, past the blue car and find the laptop on a green checkered kitchen table.
The Hornet's Nest - Intel Item #2
Next, you'll run downhill and enter a large, overgrown field with the Barateiro market. After clearing the enemies, move to the left - towards the basketball hoop - and keep an eye out for a wooden shack with a rubber tire on its roof. On two metal barrels underneath is the laptop.
The Hornet's Nest - Intel Item #3
Now you'll be running back uphill, past Pelayo's ice cream store. The laptop is inside and up three flights of stairs... you can get there more directly by entering the building higher up the hill, as indicated by the arrows in the screenshot below.
The Hornet's Nest - Intel Item #4
Right before climbing onto the roofs and running towards Nikolai’s helicopter, you’ll walk through this dilapidated soccer field. The laptop is in a broken window, behind the far goal post.
At the Garden Villas Apartments, find the management office in front of the parking lot. The laptop is on a desk inside, underneath a presidential portrait.
Exodus - Intel Item #2
Halfway through the mission is a security gate, separating the middle class area of the neighborhood from the nicer, upper class area with the bigger houses. Inside the security office is the laptop.
Exodus - Intel Item #3
Cross the little covered bridge into the upper class half of the neighborhood. Heading down the street, the laptop will be in the second house on your right. Just go upstairs and grab it off the yellow couch in the hallway.
The Only Easy Day... Was Yesterday - Intel Item #1
After breaching your first door in this mission, you'll climb two flights of stairs and go through the room pictured below. Instead of exiting immediately through those double white doors, turn around and check the cluttered shelves behind you for a laptop.
The Only Easy Day... Was Yesterday - Intel Item #2
You'll reach the location pictured below almost immediately after planting C4 on the dead Russian soldiers. Head through the small warehouse room and look for a laptop on the righthand wall shelves.
The Only Easy Day... Was Yesterday - Intel Item #3
You might spot this laptop while hiding from the helicopter. It's behind a fence at that point, but once you've destroyed the helicopter and followed the mission path around the building, you can pop back into the warehouse and grab it from under the stairs.