Back in 2006, scientists started discussing the idea of a “Doomsday Ark.” This proposed idea is to create a way to rebuild society should the end of the world come about. While the idea met with skepticism in the scientific community, it has taken a foothold and was formally presented at a conference in 2008 in Strasbourg, France.
The Doomsday Ark is similar to the seed vault locked away in a mountainside in Norway, which contains seeds for every type of plant we know of so that in the post-apocalyptic world, we can regrow any lost crops. There is also a similar vault in Great Britain that stores genetic samples for all kinds of life on Earth for the same reason. The main difference is that the Doomsday Ark would be kept on the Moon.
The initial plan for the Ark is to house hard disks containing all of human knowledge recorded in Arabic, English, Chinese, Russian, French and Spanish. This knowledge will contain DNA sequences, technological information, agricultural instructions, how to make metal, basically anything that could be used to rebuild civilization.
The initial Ark will last for approximately 35 years, at which time it will (hopefully) be replaced with a more advanced version that will include a synthetic atmosphere which can house living samples of plants as well as the given information from the previous incarnation of the Ark.
This is all well and good, but how do we go about accessing this information. The plan is constant radio transmissions beamed back to Earth. There will be roughly 4000 receiver stations that will double as supply stations that contain supplies for any survivors. The problem here is that if these stations are publicly known, they can become the target for anarcho-terrorist groups who decide that having that knowledge would be bad. The other problem is that these facilities will be susceptible to any disasters that may befall the planet. However, since it is a constant broadcast and assuming it transmits in the clear, anybody with a radio can pick up the transmission and get the information.
Just another reason to have a radio on hand for the apocalypse.