Some collections I've seen have included mountaineering maps and images, letters and papers from famous people that have been contributed to a university library, specialized image collections, diaries of Civil War officers, scientific journals dating back decades and even centuries, vintage car repair manuals, movie magazines from the golden age of cinema...the list is endless.
Mark Gross, president of Data Conversion Laboratory (DCL), is an authority on XML implementation and document conversion. Prior to joining DCL in 1981, Gross was with the consulting practice of Arthur Young & Co. He has a B.S. degree in Engineering from Columbia University and an MBA from New York University. He also has taught at the New York University Graduate School of Business, the New School, and Pace University. He is a frequent speaker on the topic of automated conversions to XML and SGML.