Fallout: New Vegas keys

General information
Keys in Fallout: New Vegas open specific doors or containers, some of which are inaccessible otherwise. Most keys can be found in the possession of non-player characters and can be pickpocketed while a few can only be retrieved if their owner has been killed. They appear in the Pip-Boy inventory in the keyring under the "Misc" heading.

Keycards

 * Elder's keycard, one of the three keycards required to start the self-destruct sequence in the Hidden Valley Bunker, found on Elder McNamara or Edgar Hardin.
 * Head Scribe's keycard, one of the three keycards required to start the self-destruct sequence in the Hidden Valley Bunker, found on Head Scribe Taggart.
 * Head paladin's keycard, one of the three keycards required to start the self-destruct sequence in the Hidden Valley Bunker, found on Hardin or Ramos.
 * Jenny Millet's security keycard, a card used in the utility room on the first floor of the REPCONN Headquarters, for bypassing security robots.
 * REPCONN second floor security card, a card on the second floor of the REPCONN HQ, to open a door on the second floor.
 * REPCONN third floor security card, a card on the second floor of the REPCONN HQ, for bypassing security robots on the third floor.
 * Lucky 38 VIP keycard, a card on Hanlon's desk in Camp Golf or Anthony House's desk in H&H Tools factory, used on a terminal in the Lucky 38 penthouse.
 * Blue sector key card, a card on Philip Lem, opens doors in the blue sector in Vault 19.
 * Red sector key card, a card on Samuel Cooke, opens doors in the red sector in Vault 19.
 * Vault 22 cave door keycard, a card in the Vault 22 Common Areas, grants access to the server room for acquiring the HEPA 20 cartridge filters.