Twitter is donating its archive to the library, going back to the first one posted in 2006.
Library Director of Communications Gayle Osterberg wrote in a blog post Friday that the volume of tweets it receives has grown from 140 million daily in February 2011 to nearly half a billion tweets each day in late 2012.
Librarians have been developing a system to preserve and organize the collection. Now the library is shifting its focus to handle the technical challenges of making such a massive archive available to researchers.
The library may work with a private partner to provide access because its own search technology is slow.