The Pip-Boy wearable computers issued to vault dwellers use Vault Boy's image for a variety of purposes in their user interfaces. Vault Boy was the most visible propaganda piece of Vault-Tec Corporation. The image of Vault Boy could be found everywhere, exhorting American citizens to register for their place in a vault - even though in the end, only a few thousand were ever chosen, and only a fraction of those were actually among the real survivors. During the years before the Great War, Vault-Tec billboards advertised their unique product, the massive underground vaults designed to survive a nuclear attack.
