Access codes

 is the name of a holotape in Fallout 3 and Fallout: New Vegas.

Locations

 * In Fallout 3, it can be found behind a Nuka-Cola vending machine inside the Anchorage War Memorial.
 * In Fallout: New Vegas, it's added to the players inventory upon obtaining the platinum chip. If the player drops the platinum chip, the note is removed until the player gets the chip back.

Behind the Scenes
This translates from hexidecimal to "CAEK > PIE".