Excerpt:
The Digital Mathematics Archive is a digital collection of mathematical sources, with a primary focus on documents from the late 19th century through today. Papers, letters, manuscripts, e-mail messages, Usenet-news postings, computer rendered images and computations, program source code... many of today's source documents are much more ephemeral than the documents of the previous century. This archive will allow some of this material to be preserved and will give it as wide a distribution as possible.