Fontaine Futuristics! Power to the People!
BioShock (Xbox 360)
Here are the locations of five of the Power to the People weapon modification systems I can recall scattered throughout Rapture.
#1. Neptune's Bounty - Fontaine Fisheries cold storage area; under the freezer room where you fight Peech Wilkins.
#2. Arcadia - Area in front of the ticket vending for the Farmer's Market.
#3. Farmer's Market - In the Worley Whinery; half-submerged in the lowest level of the cellar and next to the distilling tanks.
#4. Fort Frolic - Sinclair's Spirits in Upper Poseidon; down in the cellar.
#5. Apollo Square - In Fontaine's Home For the Poor; the third floor under Atlas' ammo storage.
I hope this helped!
Post the locations that I missed if you want to!
This topic has been covered quite a lot so I am going to close this thread a quick search pulled up this thread.