My wife serves as historian for a local chapter of a women's group. She uses the binders to organize and protect sheet protectors to conserve and protect the historical items.
I particularly like these notebooks/binders for filing tax records as they have easy open rings plus 2 pockets in the front and back cover. With the clear pocket on the exterior I am able to label them very easily and after 7 years I can RE-label and reuse for another year.