Wait, Call of Duty uses a game engine called "iw engine". I think the IW engine stands for Infinity Ward, the developer of the Call of Duty series. The version might be 7, so "iw7" could indicate the seventh iteration of their engine. The "ship.exe" part sounds like a executable file that's part of the game engine. So putting it all together, "iw7-ship.exe" might be the executable file for a version of the IW engine used in a specific Call of Duty game.