e these properties but rather discuss
how we implement (or fail to implement) them in software, while highlighting
some of the potential difficulties introduced.
### Durability
In 1964, in the midst of the “loss” of the twentieth-century, Paul Baran’s
RAND Corporation publication [On Distributed
Communications](https://www.rand.org/content/dam/rand/pubs/research_memoranda/2006/RM3420.pdf)
examined “redundancy as one means of building … highly survivable and reliable
communications systems
n
of disk space and bandwidth for a particular library, so that when someone
loses electricity or drops their computer, the library will not also break.
Although this is a technical claim — one that has been made in relation to
many projects, from Baran to BitTorrent — it is more importantly a social
claim: the users and lovers of a library will share the library. More than
that, they will share in the work of ensuring that it will continue to be
shared.