2. Correspondence and Subject Files, alphabetical
- UADR 17/26 Folder : Osa - Osh 1924-1929
- UADR 17/27 Folder : Osl - Osw 1924-1929
- UADR 17/28 Folder : Ot 1926-1928
- UADR 17/29 Folder : Ou - Ow 1919-1929
- UADR 17/30 Folder : Oberst, Eugene "Kentuck" (Saint John's, Shreveport, LA) 1924-1925
- UADR 17/31 Folder : Oberst, Eugene "Kentuck" (Roman Catholic H.S., Phila.) 1925-1927
- UADR 17/32 Folder : Oberst, Eugene "Kentuck" (Roman Catholic H.S., Phila.) 1928
- UADR 17/33 Folder : Oberst, Eugene "Kentuck" (DePauw Univ Greencastle, IN) 1928-1929
- UADR 17/34 Folder : Oberst, Eugene "Kentuck" (DePauw Univ Greencastle, IN) 1929
- UADR 17/35 Folder : Oberst, Eugene "Kentuck" (Washington and Lee Univ, Lexington, VA) 1929
- UADR 17/36 Folder : O'Boyle, Harry W. (Des Moines, IA) 1924-1929
- UADR 17/37 Folder : O'Brien, Eugene V. (Western Lawn Tennis Association) 1927
- UADR 17/38 Folder : O'Brien, George L. (South Bend, IN) 1924-1927
- UADR 17/39 Folder : O'Brien, George L. (South Bend, IN) 1928-1929
- UADR 17/40 Folder : O'Brien, William L. Jr. (Fred J. Ringley Printing Co.) 1927-1928
- UADR 17/41 Folder : O'Brien, William L. Jr. (Fred J. Ringley Printing Co.) 1929
- UADR 17/42 Folder : O'Byrne, Thomas G. (Birmingham, AL) 1928
- UADR 17/43 Folder : Ochoa, Leoncio ("Fal" Basketball Team, Mexico City) 1929
- UADR 17/44 Folder : Ochse, William (San Antonio, TX) 1929
- UADR 17/45 Folder : O'Connell, Ambrose (New York, NY) 1925-1928
- UADR 17/46 Folder : O'Connell, Ambrose (New York, NY) 1928-1929
- UADR 17/47 Folder : O'Connor, Daniel J. (Notre Dame Club of Chicago) 1926-1929
- UADR 17/48 Folder : O'Donnell, Charles L. Rev CSC (President) 1927-1928
- UADR 17/49 Folder : O'Donnell, Charles L. Rev CSC (President) 1929
- UADR 17/50 Folder : O'Donnell, Cleo (Holy Cross College, Worcester, MA) 1925-1929
- UADR 17/51 Folder : O'Donnell, Hugh A. (New York Times, NY) 1924-1925
- UADR 17/52 Folder : O'Donnell, Hugh A. (New York Times, NY) 1925-1926
- UADR 17/53 Folder : O'Donnell, Hugh A. (New York Times, NY) 1927
- UADR 17/54 Folder : O'Donnell, Hugh A. (New York Times, NY) 1927-1928
- UADR 17/55 Folder : O'Donnell, Hugh A. (New York Times, NY) 1929
- UADR 17/56 Folder : O'Donnell, J. Hugh Rev CSC (Prefect of Discipline) 1919-1927
- UADR 17/57 Folder : O'Donnell, J. Hugh Rev CSC (Prefect of Discipline) 1927-1928
- UADR 17/58 Folder : O'Donnell, John E. (Davenport, IA, Democrat) 1926-1927
- UADR 17/59 Folder : Officials 1923-1925
- UADR 17/60 Folder : Officials 1925/05-07
- UADR 17/61 Folder : Officials 1925/12
- UADR 17/62 Folder : Officials 1925/12
- UADR 17/63 Folder : Officials 1926/01-02
- UADR 17/64 Folder : Officials 1926/03
- UADR 17/65 Folder : Officials 1926/04-09
- UADR 17/66 Folder : Officials 1926/09-12
- UADR 17/67 Folder : Officials 1927/01
- UADR 17/68 Folder : Officials 1927/01
- UADR 17/69 Folder : Officials 1927/02-03
- UADR 17/70 Folder : Officials 1927/04-12
- UADR 17/71 Folder : Officials 1928
- UADR 17/72 Folder : Officials "Question on Football Rules" (1 - 10 Series) 1927
- UADR 17/73 Folder : Ofstie, Harold S. (Centre College, Danville, KY) 1924-1925
- UADR 17/74 Folder : Ofstie, Harold S. (Los Angeles, CA and Everett, WA) 1928-1929
- UADR 17/75 Folder : O'Hara, Joseph P. (Glencoe, MN) 1922-1927
- UADR 17/76 Folder : O'Hara, Joseph P. (Glencoe, MN) 1929
- UADR 17/77 Folder : Ohio State University (Columbus, OH) 1926-1929
- UADR 17/78 Folder : Ohio University (Athens, OH) 1920-1929
- UADR 17/79 Folder : Ohio Wesleyan Univ / George E. Gauthier 1926-1929
- UADR 17/80 Folder : Oien, Frederick C. (Chicago, IL) 1929
- UADR 17/81 Folder : Oien, John G. (Chicago, IL) 1927-1929
- UADR 17/82 Folder : Okeson, Walter (Lehigh Univ, Bethlehem, PA) 1927-1929
- UADR 17/83 Folder : Olander, Milton M. (Univ of Illinois, Urbana, IL) 1925-1928
- UADR 17/84 Folder : Oliver, Gerald A. (San Diego, Santa Ana, CA) 1926-1927
- UADR 17/85 Folder : Oliver, Joseph Doty (South Bend, IN) 1925-1928
- UADR 17/86 Folder : Olsen, Fred (Kewanee, IL) 1925-1927
- UADR 17/87 Folder : Olsen, Fred (Kewanee, IL) 1927-1929
- UADR 17/88 Folder : Olsen, Walter (Mt. Clemens, MI, Public Schools) 1926-1929
- UADR 17/89 Folder : O'Malley, Thomas (Vanderbilt Hotel, New York, NY) 1927-1929
- UADR 17/90 Folder : O'Neil, Sally (1926 Mascot, Hollywood, CA) 1928
- UADR 17/91 Folder : Oregon State Agricultural College (Corvallis) 1925-1929
- UADR 17/92 Folder : Ormiston, E.H. (Buchanan, MI, High School) 1927-1929
- UADR 17/93 Folder : O'Rourke, Joseph P. (Re: George Gipp's Death) 1928/11
- UADR 17/94 Folder : Orton, George W. (Stadium, Philadephia, PA) 1925-1929
- UADR 17/95 Folder : Osborn, R.S. (YMCA Univ of Virginia, Charlottesville) 1929
- UADR 17/96 Folder : O'Shea Knitting Mills: William C. King 1920-1926
- UADR 17/97 Folder : O'Shea Knitting Mills: William C. King 1927
- UADR 17/98 Folder : O'Shea Knitting Mills: William C. King 1928
- UADR 17/99 Folder : O'Shea Knitting Mills: William C. King 1929
- UADR 17/100 Folder : O'Shea Knitting Mills: Michael Lynch 1925-1926
- UADR 17/101 Folder : O'Shea Knitting Mills: Michael Lynch 1926-1927
- UADR 17/102 Folder : O'Shea Knitting Mills: Michael Lynch 1927/06-12
- UADR 17/103 Folder : O'Shea Knitting Mills: Michael Lynch 1928-1929
- UADR 17/104 Folder : O'Shea Knitting Mills: Correspond with Monogram Men 1928-1929
- UADR 17/105 Folder : O'Shea Knitting Mills: Miscellaneousellaneous 1920-1926
- UADR 17/106 Folder : O'Shea Knitting Mills: Miscellaneousellaneous 1927-1929
- UADR 17/107 Folder : Osterhaus, Hugo W. Captain USN 1928-1929
- UADR 17/108 Folder : Pac - Pai 1926-1929
- UADR 17/109 Folder : Pal 1924-1929
- UADR 17/110 Folder : Par 1924-1927
- UADR 17/111 Folder : Par 1928-1929
- UADR 17/112 Folder : Pas - Pat 1927-1929
- UADR 17/113 Folder : Pau - Pay 1925-1929
- UADR 17/114 Folder : Pea - Pei 1925-1929
- UADR 17/115 Folder : Pel - Pep 1920-1929
- UADR 17/116 Folder : Per 1924-1927
- UADR 17/117 Folder : Pes - Pet 1924-1929
- UADR 17/118 Folder : Pf 1924-1926
- UADR 17/119 Folder : Ph 1925-1929
- UADR 17/120 Folder : Pi 1923-1929
- UADR 17/121 Folder : Pl 1926-1928
- UADR 17/122 Folder : Poh - Pop 1924-1929
- UADR 17/123 Folder : Por - Powel 1924-1929
- UADR 17/124 Folder : Powers 1925-1928
- UADR 17/125 Folder : Pra - Pre 1925-1929