- civil court records6,303
- periodicals6,099
- newsletters5,954
- maps (documents)5,784
- serials (publications)5,503
- letters (correspondence)4,707
- marriage licenses4,555
- slides (photographs)4,516
- files (document groupings)4,251
- financial records3,872
- born digital3,740
- executive orders3,595
- maps3,224
- judicial records3,166
- color transparencies3,110
- black-and-white prints (photographs)2,961
- military records2,945
- minutes (administrative records)2,869
- oral histories (literary works)2,864
- safety film negatives2,835
