Vault City designer notes

The Vault City designer notes is a holodisk in Fallout. It credits the developers of the game.

Location
The holodisk data can only be acquired by direct download to your Pip-Boy from the main computer in Vault 8 after defeating the inhabitants of the oil rig (it's the "talking" terminal in the eastern portion of level 3 of Vault City's vault, the same computer that provides the location of Vault 15). You will then see "Vault City Designer Notes" in the "Status" section of your Pip-Boy.

The computer referenced toward the end of the designer notes is in the northwest, or upper left, area and will provide 20000 XP each time it's used.