Super Duper Mart

Super Duper Mart is a big-box store with at least one store in the Capital Wasteland near Megaton. These stores have food and medicine. Moira asks you to search one for a book she is writing on the wastelands. They also sell Nuka-Cola in pre-war ads. Raiders call this store home having even made makeshift bridges over the aisles, also there is a protectron (like the one in front of Megaton) that if hacked will protect you from the Raiders and some weapons you can find are a hunting rifle and scoped pistol.

Appearances
This store (or stores) only appears in Fallout 3

Quests
The Wasteland Survival Guide - You will be asked to go here by Moira Brown to see if they still have medicine and food.